There was a steady pulsation of the engines during the entire afternoon without cessation until five o'clock, when the submarine submerged and continued under water for an hour. The three captives had now learned a great many of the manoeuvers incident to the diving operations, the signals accompanying each action, and studied with the greatest diligence and care the direction indicator and inclinometer.
"I have been noticing the indicator for the last hour," said Ralph, "and it didn't change once. Are we going due north?"
"The indicator that you see is not for the purpose of showing the points of the compass, but to tell whether or not there is a turning movement in the ship. If, for instance, the rudder should be turned to starboard or to port, the dial would swing in such a position as to show how much of a turn has been made, and no more," responded the captain.
"Suppose then, that after making a quarter turn, the ship should again go ahead on a straightline, what would happen to the dial?" asked Alfred.
"In that case the dial would again indicate that by coming back to its original position,—or, in other words, the dial would show that the ship had then assumed a new direction of sailing, and if it again changed to the right or to the left the indicator would reveal this to the observer," remarked the captain.
"I wish we had a compass," said Ralph.
"Unfortunately, they have taken our watches and pocket compasses," said the captain. "We may contrive, later on, to get a glimpse of the steering compass."
"Do you know where it is?" eagerly inquired Alfred.
"The navigating officer's instrument is in the conning tower, but it is usual, too, to have a similar instrument below, and I am sure it is located to the left of the cook's galley. It would not be safe, however, for either of us to be spying around in that quarter," responded the captain.
That night they were again locked in their narrow apartment. As they had been provided with a good meal it was not such an unpleasant experience, and they were also comforted by the feeling that the submarine was now engaged in a no more perilous duty than trying to reach some port.
That night was followed by a trying day of waiting. Singularly, they had not been permitted to ascend the hatchway stairs since the first day of their capture.
"A glance at the sun would be enough to tell us the direction," remarked the captain after they left the table at the lunch hour.
"I suppose they are keeping us down here for that purpose," suggested Alfred.
"I have thought," replied the captain, "that the very fact of keeping us in ignorance of the direction they are going is the best indication that we are making for a concealed base."
When they retired the second night the captain remarked: "It is now plain to my mind that we are on the way to Germany, or, possibly, to a base somewhere at a greater distance than Spain."
"How long would it take to make the trip to Germany?" asked Alfred.
"If we circled the British Isles and came in by way of Norway, it would mean a run of 1,400 miles. To go by way of the Channel would be about 800 miles. It would make but little difference in point of time," answered the captain.
"Why wouldn't it take longer to travel 1,400 miles?" asked Ralph.
"Because on the long route we would be able to travel four-fifths of the way on the surface, and would not have to avoid mines and nets. The Channel route is a dangerous one, requiring the utmost caution," said the captain.
The second morning Alfred was outside, as usual, consulting the instruments, when a voice remarked in response to an inquiry: "48, 10." He paid no attention to it at the time, but later on, in a conversation, remarked to the captain:
"Some one in the conning tower, this morning, said '48, 10.' What do you suppose he meant by that?"
"Glad you remembered that. Are you sure the figures you give are correct?" asked the captain eagerly.
"Sure of it," was Alfred's reply.
"Then we are near the English Channel. Good; I am glad to know that. Did you hear them refer to any other figures?" asked the captain.
"What would the other figures be?" asked Ralph.
"Of course, I can only guess. The figures you have given me unquestionably represent forty-eight degrees and ten minutes north latitude. What interests me most is to get our position east and west," said the captain.
"About what longitude are we in?" asked Ralph.
"If we are less than five degrees west we must be in the English Channel, and it would appear that they are taking the shortest route. If we should be seven or eight degrees west I should regard it as a pretty sure symptom that we are going to encircle the British Isles," remarked the captain.
Late that afternoon Ralph rushed into their little cabin and said:
"I have an idea that I can tell you the direction we are going."
"Have you heard anything?" asked the captain.
"Not a word," answered Ralph. "I have just made an observation," he continued, laughing.
"That's good," responded the captain. "I think we are sailing north by west."
"You are wrong," replied Ralph; "we are going due east."
"Are you sure?" asked the captain, exhibiting unusual interest in the news. "How did you find it out?"
"I saw the sun," said Ralph with a chuckle.
"How and where did you see it?" asked Alfred, incredulously.
"Well, I didn't exactly see the sun, but I saw a streak that came from the sun," was the reply.
"That's just as good," responded the captain. "Where did you see it?"
"I was at the indicator when an officer went up and the hatch was raised. As he didn't push it all the way down I had an idea he might soon return, so I moved up and stood between the twin tanks to the right of the steps. When the officer raised the hatch a streak of sunlight went right across the under side at the corner of the door, and I knew it couldn't come in at the front port hole," said Ralph, with a glow of pleasure in the discovery.
The captain shook his head slowly, as he said: "I am afraid this will mean an additional source of worry to all of us; it is bad enough to be locked up and subjected to the guns of vessels and warships, but it will be doubly hazardous to pass through the mine fields, and avoid the nets."
"Do you know anything about them, and how and where they are located?" asked Alfred.
"Yes, I have a pretty good knowledge of their location, and how to avoid them, although they constantly change the nets, or provide new safety outlets," said the captain.
The Steel NetsThe Steel NetsToList
The Steel NetsToList
"What do you mean by safety outlets?" asked Alfred.
"Immense steel nets are stretched across the straits from Calais to Dover, two lines, in fact, between which the vessels plying between England and France go to and fro in safety. Furthermore, war vessels guard these nets on both sides, so that it would be a difficult matter to get near the nets," said the captain.
"But submarines do seem to get through somewhere; do they not?" asked Ralph.
"Yes; owing to their ability to make the trip under water, and taking advantage of thedarkness, it is sometimes the case that they get through without being entangled in the nets," he replied.
"But how do the ships that sail along the Channel get through?" asked Alfred.
"That is just what I was referring to when I spoke of safety outlets. At a certain point there is an opening through the nets at one side, through which vessels can pass into the line between the two wire cordons. The opening in the other line of nets is not directly opposite, but a mile or so off to one side, so that in order to get to the opening in the other nets, it is necessary for the ship to sail along in the safety zone between the two nets, and make a turn at right angles to get out through the second opening. That method has been found to be most effective, and is called the safety lane," responded the captain.
They were now in or near the most widely traveled part of the ocean on the western front of the continent. Thousands of ships pass and repass that zone which reaches from the southern part of Ireland to the western coast of France, and it was remarkable that the submarine was able to move along up to this time on the surface without being detected.
Before the sun had gone down that night, however, they were compelled to submerge twice, and then the mantle of night shrouded the vessel and it moved along with more boldness. On this the fourth night of captivity, they were not locked in their prison.
"I cannot account for it," said the captain."Possibly the commander has some little human sympathy left, and does not want to drown us like rats in a cage."
Neither the captain nor the boys slept much that night. They were too much occupied with constantly watching the manoeuvers necessary on the part of the commander and his crew to prevent detection as they passed up the Channel.
"I have spent years on the Channel as a navigating officer and in charge of various types of ships in the merchant service, as well as on our own naval vessels, and I know, probably, better than the lieutenant in charge of the submarine, what the dangers are. It is my belief that the lieutenant has come over this course before, and probably knows a safe, or measurably safe route, and has taken the chances of returning, but no one, however skilful a navigator he may be, can be sure of making exactly the same course twice. The tides may be against him; he may be out of his reckonings hundreds of feet, and that is too big a margin, where a hundred feet in width is the limit through which his vessel may pass in safety."
The captain thus, in general terms, set forth the perils of the route that the commander of the submarine had taken, and stated also, very plainly, that they must now be prepared to meet the greatest of all dangers. Sleep, therefore, could not be considered.
The long and weary night at last came to an end, and the appetizing odors of the morning meal were wafted to them. Their toilets wereexceedingly simple affairs, a small cake of soap, warm water, and a long towel serving for the three. They had no trouble in dressing, for their clothing had not been removed. They were obliged to dispense with the bath, for, although all these boats are provided with comforts of that kind, none of them was available to the captain and the boys, and they did not ask that any privileges be extended to them.
No sooner had breakfast been served than the machinery began to slow down until finally it ceased. Not a perceptible motion was now observed. A pulsator or two were at work, and a slight rumble due to the action of the dynamo came to their ears.
"I suppose we are now on the bottom," suggested Ralph.
"Yes; during the daytime it will be necessary to keep quiet. Even the periscope may reveal our presence," remarked the captain.
A little information as to the activities of the crew during these periods of rest may be interesting. Idleness breeds discontent and mischief. It is upon the principle that constant work encourages contentment and makes for efficiency, that the Germans require the continued activity which was shown by the occupants of the submarine.
The vessel was manned by twenty-seven officers and men. The personnel being as follows: A lieutenant, a sub-lieutenant, two under or petty officers, a physician, a cook and two oilers, two first-class machinists, and seventeen helpers, orseamen, although it was evident, as the captain expressed it, that few of the helpers had seen much sea duty.
While it is customary to divide the duties on shipboard into three watches, during the period of twenty-four hours, so as to give each squad a period of service every day at a different period, it would be difficult to carry out the same regulations on board a ship of this character.
The captain said: "I notice that they have practically two watches, one taking up the duty from midday until twelve at night, and the other from midnight to noon. Yesterday, I noticed the same shift that was on duty in the morning continued at work all the afternoon, so it is possible that every three or four days shift No. 1, which works from noon to midnight, will be changed so that for the next four days the time for their services will be from midnight to noon."
Attention is called to this method of doing duty so that the reader may understand certain events which will be referred to later.
The personnel of the shifts was also changed at intervals so that while the lieutenant during one shift would have at work a certain machinist and petty officer, during the next or second shift thereafter another machinist or petty officer would be on duty. In this manner all became efficient, for they had the opportunity afforded of being drilled and handled by different combinations of men and assistants.
The starting of the heavy machinery was sufficient indication that night had come. They were now going up and at an angle which was very perceptible. The boys had become quite expert in detecting certain activities, as they tried in every way to understand the use of the signals. One thing was certain; two sets of bells were brought into play as the signal for changing the motive power. The first signal, three bells followed by two more, was invariably the necessary preparation for this event.
A highly pitched bell next gave the signal to stop the gasoline engines and a deep-toned bell indicated the coupling of the electric motor. Occasionally a new set of signals would resound, which they tried to figure out. During the night Alfred thought he had found the key.
"Did you notice the big hand wheel on the side of the upright tank, which we pass as we go into the dining room?" he remarked.
"That is connected with a large valve," said the captain. "What did you observe?"
"Well, did you ever notice that before they rang the shrill bell four times we always have heard a whistle?" asked Alfred.
"Why, I have heard the bell ring four times on several occasions without the whistle," contended Ralph.
"So you have, but it was always after the four rings that followed the whistle. A little while ago I was near the tank, and I heard the whistle. The attendant sprang to the wheel, and when the four rings came he turned the wheel around twice. When the four next rings came (without the whistle, of course), he quickly turned it back again," said Alfred.
"That is the submerging tank," said the captain. "I see you are rapidly learning how to handle a submarine," and he laughed at the eagerness of the boys trying to conquer the details of signaling.
During that night there was hardly a half-hour but some movement or other was indicated by the bells. They submerged, halted, rose to the surface, steamed at full speed, and in one or two instances it was evident from the sudden stopping that the submarine had to reverse.
This constantly kept them alert, and while engaged in conversation late in the morning, they were thrown forward on their seats with a motion that indicated a collision with something which was not very rigid, for there was no concussion such as usually accompanies the contact of the hull of a vessel with a hard object.
The boys looked at the captain in astonishment. They could now feel the propeller pulling in the opposite direction, only to be brought back again with the same springy collision, as when it had gone forward and first struck the strange obstacle.
The captain's face paled, and the boys plied him with questions as they saw his perturbed countenance.
"What do you think it is?" asked Ralph, as he saw the anxious seamen, and the second officer rushing about shouting orders, while one of them seized the main valve wheel and turned it.
"We are caught in one of the steel nets," said the captain quietly.
The boys' faces grew deadly pale. They knew what such a calamity meant. Few, if any of the submarines caught in the nets, ever escaped. The boys, while they did not know this, were, in a measure, aware of the great danger to submarines from this source. They were alarmed particularly on account of the serious manner in which the captain acted the moment the first impact took place.
The captain now arose, followed by the boys, and marched through the narrow passageway toward the lieutenant who was leaning over one of the air compressors.
"Is there anything we can do to help you?" asked the captain.
The lieutenant looked up and replied: "We can do nothing but change the trim of the ship. Everything portable in the stern must be moved forward. Your assistance will be appreciated," wasthe reply, an answer that was in marked contrast with his former demeanor.
The lieutenant then quickly detailed four men, who, together with the captain and the two boys, were directed what articles to carry forward. In this exercise they found many unexpected nooks and turns. The articles removed were mostly ship's supplies, stores, boxes of canned goods, drugs in cases, and a lot of tubing. Some of the boxes must have contained machinery, or mechanical parts, for they were very heavy.
They were engaged at this work for fully an hour, and the task proved a difficult one, for the passageways were narrow and tortuous, and sometimes it was necessary to move through narrow alleys which ran almost directly across the ship. Every available bit of space is utilized in these vessels for the operating machinery.
The entire length of the submarine was 126 feet, and the material had to be carried a distance of about eighty feet. The lieutenant was in the stern portion, pointing out the articles which should be taken, while the sub-lieutenant directed the placing of them in the bow.
The captain and Ralph were just depositing a load in the hold near the bow, when a peculiar noise was heard, resembling a scraping, rasping sound. Before they had time to turn around, or move from their positions, the rear end of the submarine seemed to swing upward, bringing down and scattering among the machinery a choice lot of boxes and parcels.
A groan followed. Something peculiar had happened,—a thing unique in the annals of submarining. The vessel, after the peculiar motion, was quiet, but it was lying at an angle of forty-five degrees. The seamen and the captain hurriedly tried to move back in order to discover what had happened and from whom the groans proceeded.
It was hard work, and dangerous, too. Alfred was found pinned between the tanks, and temporarily held by several cases, but, fortunately, he was not hurt in the least.
Directly forward of the conning tower stairway the captain now noticed an object, and upon examination it was found to be the lieutenant, who had been thrown a distance of more than thirty feet through the tangled machinery. He was unconscious.
The physician was soon by his side, and a frightful gash was observed on the right side of the officer's face. Two men nearby were groaning. One had a broken leg, and the other several contusions about the head, and, owing to their crippled condition, it was just as much of a task to lower the bodies down into the inclined hold as to walk upward.
This was finally accomplished, and the lieutenant, with the two injured men, were landed in the long compartment, which served as the dining room.
The sub-lieutenant was found pinned by some boxes between two stanchions, which had not been distributed and placed within the compartments.The seaman soon released him; he was not injured in any way, and now that the lieutenant was in a serious condition, the command devolved on him.
"That motion, if anything, will disentangle us from the nets," said the captain, addressing the sub-lieutenant. The latter did not reply, but turned on the captain with a frown.
"Your opinion is not requested!" he said in a terse manner.
The captain made a quiet bow and moved toward their small room, the boys following.
"I am sorry that fellow is in command," said Alfred. "I never liked him from the first."
"I'll bet we were locked up by that fellow's orders, for I don't believe the lieutenant had anything to do with it," remarked Ralph. The captain nodded his head, as he replied: "I knew that from the first day."
"I'd like to get ahead of him some way," said Alfred.
The captain looked at the boys for a few moments, then quietly put his hands on their arms, as he said: "Getting ahead, or getting even, doesn't pay, as a rule; but I have known where a few have been able to overcome a great many, as a duty, for that is what makes men strong."
Alfred's eyes fairly bulged, as he gazed at the captain. "Isn't it a duty to capture this submarine?"
The captain leaned forward and held up a warning hand. Ralph rose up and glanced around. "Why can't we do it?" he asked.
"There is only one thing lacking; yes, it has been in my mind from the first moment we came aboard, but we cannot do it without weapons. With them in our possession we might succeed. Why, if we could have had them this afternoon it would have been an ideal time to make the attempt," said the captain.
"I have something to tell you," said Alfred, as he lowered his voice.
"What is it?" asked the captain.
"I know where there is a box of revolvers," he replied.
"Where?" asked the captain, agitated visibly.
"Do you remember the two big upright drums which I was pinned against when the ship went up?" asked Alfred.
"Yes," replied the captain.
"Well, one of the boxes broke open when it came down the passageway, and when I saw what was in it I pushed it way under the base of the tank on the left side," said Alfred.
"The revolvers are all right, but we may have some trouble in getting cartridges," replied the captain. "But wait," he continued, "I am sure I carried cases of them down the passageway."
"If I am not mistaken, there are several boxes near there,—rather long, slim boxes, are they not?" asked Alfred.
"Yes; with a red label on the corner," interrupted Ralph. "I can put my hands on a box any minute."
"Then you are with me and will carefully followout my instructions?" inquired the captain, looking at them intently.
"We will follow you in whatever you ask us to do," replied Ralph.
"You must remember that the business we are about to engage in means life or death. Once begun we cannot go back. We have no line of retreat. While it is most hazardous, the feat would be a wonderful one," said the captain.
"No; we are not afraid. Both of us have been in some dangerous places and have come out all right. We have confidence in you," said Alfred slowly and deliberately.
"Thank you for that," replied the captain. "We must begin the preparations at once, for at the present time when all is confusion we can get the opportunities that may not be offered later on."
"The boat seems to move," said Alfred.
A perceptible swaying motion was now observed. The vessel was still lying at the inclined position heretofore described. As they were about to crawl out of their cabin, they heard the voice of the sub-lieutenant:
"Connect the forward motor!"
They drew back into the room. "What is that for?" asked Ralph.
Before the captain could reply came the second order:
"Reverse!"
The motor buzzed, but no effect was produced on the boat.
"That seems singular," observed Alfred.
"Not at all," answered the captain.
"Why not?" asked Ralph.
"The stern of the submarine is out of the water," answered the captain.
The power was shut off, and again turned on. It was now obvious that they were dangling in the water with the prow of the boat held fast in the entangling nets. As they glanced out the door they could see the faces of the seamen moving to and fro with terror depicted on their countenances.
"They may well fear the results," said the captain. "But we have a duty to perform, and I might as well advise you of several things which we should do and observe. We must try to obtain the weapons and ammunition. That will be the first duty. Does either of you know where the electric switches are?"
"Yes," answered both of the boys in one breath.
"I mean the switch in the hold," said the captain.
"Yes," said Alfred. "The one I mean is close to the dynamo on the switchboard, behind the steps leading to the conning tower."
"That is correct," answered the captain. "The control switch for the lighting is in the conning tower, however, and I call your attention to this, as it may be of service to us in our work."
"I can see, now, that to keep that in our control would be the main thing," said Ralph.
"The officer has not yet given any orders to putthe boxes in the passageways aside, and he will not do so, probably, until they are able to ascertain whether or not the ship will free itself; under the circumstances, Alfred, I must delegate you to secure a half-dozen of the revolvers, or remove them from the box so that we can secrete them later," said the captain.
As Ralph crawled from the cabin and moved toward the main gangway, the captain added: "If you remember where one of the ammunition boxes is you might smuggle it into this room, but proceed very cautiously."
Ralph soon made his way back, carrying with him one of the revolvers. "There are a dozen in the box," he said, "and I brought one over to show you. You see, it is the kind from which the cylinder can be removed. Wouldn't it be a good idea to take the cylinders out of all that we can't use?"
"Capital idea," said the captain. "If you can find any wire, put it where you can quickly place your hands on it."
"I found a box of ammunition also," continued Ralph, "but I haven't tried whether it would fit the revolvers."
An examination revealed the fact that the cartridges were not of the same calibre. It was, indeed, a terrible disappointment.
"Here it is," said Alfred, as he slipped into the door of the room.
"Ah, this is a different size; you have the right ones, fortunately," said the captain.
"Now, let me give you a few words as to the next,——"
A pronounced lurch in the vessel's position interrupted the captain. The seamen were now rushing around frantically, and talking excitedly.
"Hold your tongues!" shouted the sub-lieutenant.
The vessel was, evidently, moving. Occasionally, there would be a heavy, rasping sound, and the rear end of the boat would seem to settle down a few feet.
"It's coming all right," said Ralph in excitement.
"Connect forward motor!" again shouted the sub-lieutenant.
The motor turned smoothly without producing a disturbing influence on the ship, indicating that the propeller was still in the air.
"I fear that the sub-lieutenant does not know his business any too well," remarked the captain.
The boys wondered at the remark which the captain had made, and were about to ask him for an explanation, when the electric lights suddenly died out, and all were left in total darkness. The captain crawled past the boys and felt his way toward the stern of the vessel.
"The storage batteries!" was all he said.
That there was confusion on the part of the crew of the vessel, was apparent, for the sub-lieutenant shouted one order after the other, until he seemed to be incoherent, and, as a result, no one knew what was expected of him or what to do.
Evidently, the captain knew the trouble and how to remedy it, for within a minute the lights were again in commission, and the captain was noticed at the main switch. From that point he shouted to the sub-lieutenant:
"I found a box on the switchboard. It had slipped down and thrown out the switch bar at the time the boat made the last lurch."
"Thank you for the service," said the sub-lieutenant, to the surprise of the captain and boys.
As the captain returned to their room he remarked: "The sub-lieutenant was very polite; probably he would not be so likely to thank me for some other things I have done."
"What! since you left us two minutes ago?" asked Ralph.
The captain nodded. "But I started to say a few minutes ago," he continued, "that we ought to have our work planned out ahead and thoroughly understand each other. There is one thing I must impress on you, and that is, we must not again be locked up in this room. I have no faith in the present commander, and would be very much mistaken if he permits us to have our freedom after we once get free of the nets."
"What must be done if he again orders us locked up?" asked Alfred.
"That brings us to the point where we must make a canvass of the situation as it confronts us. Let me see; there are three men in addition to the commander, who need not be reckoned with in a contest. Fortunately, one of the men is a machinist, and the only other man except the sub-lieutenant, of any intelligence, is the doctor. I doubt if he would be a strong factor against us," said the captain.
"The fellow who had charge of the men carrying the boxes is nothing but a chump," said Ralph. "I wouldn't be afraid of him."
"I am considering more the character of the men who are able to handle the boat, and who know the intricacies of the mechanism. I can see wheremen of that sort will be able to make it very interesting for us if we should attempt to capture the officers and crew," said the captain thoughtfully.
It was evident that the vessel was slowly righting itself, for every minute or two there would be a slight sinking movement, which was very gratifying.
"Where are the revolvers?" asked the captain.
"I found a dandy place for them, and can get them in a minute, if wanted," said Ralph.
"Captain, I wanted to ask you some time ago what you meant by saying that the sub-lieutenant didn't know any more about submarining than he ought to. What did you mean by that?" asked Alfred.
"One of the things I had in mind was, when he was trying to start the propellers, that he could have found an easier way to learn whether they were in the water or not," was the answer.
"How so?" asked Ralph.
"The indicator board in the conning tower shows just how far the vessel is under water," replied the captain.
"But," said Alfred, "would that tell it correctly if one end of the vessel should be up and the other down, as this is?"
"Why not? It would indicate how far down in the water the hull would be amidship, and it would not require much involved calculating to figure out where the stern of the vessel would be if he knew the angle at which the hull was resting," answered the captain.
"I would just like to know how far we are down," said Ralph, looking up the stairway into the conning tower.
"Do you think you could spot the right dial face if you went up?" asked the captain.
"I think I could," said Ralph, rather doubtingly, it must be admitted.
"Then I'll give you a little hint, if you'd like to try to make an investigation," said the captain. "Directly forward of the table, which contains the chart, and below the three levers, you will see a glass column with red colored liquid in it,——"
"I know what you mean now," said Ralph, interrupting.
"Well, simply get the number on the card on the right side of the glass column. Do you understand?" remarked the captain.
"Yes; but why not take the numbers on the left side also?" asked Ralph.
"They merely indicate the pressure. Depth below the surface is all we want," rejoined the captain.
"Well, here goes; and I hope they won't catch me at it," said Ralph, as he slowly moved out.
"One moment," said the captain, as he put forth a restraining hand. "What will you do, or how will you act if some one should catch you in the tower?" he asked.
Ralph hesitated: "I hadn't thought of that; why,—well,—I suppose I should try to explain it in some way or other," he said.
"I am afraid that would not do. Allow me tomake a suggestion. Go up boldly, as though you had a perfect right to, or that you did not suspect it was a forbidden place; if some one accosts you look at him in a surprised way, make an apology, and retire; I give you this pointer because you may be flustrated and unable to make a prompt reply, and that would show guilt of some kind," said the captain.
Ralph went out and loitered about, gazing at the various pieces of machinery, and finally stood on the steps of the conning tower, which, at the angle of the boat in its inclined position, were almost horizontal. He stretched himself out on the stairs, and turned his head. From that point he could see the red liquid in the glass column, but it was difficult to read the figures.
The glare from the electric light interfered with his sight, and before he had an opportunity to get a glimpse of the figures from his new position, one of the petty officers crawled along the passageway, and, noticing him lying on the stairs, peremptorily ordered him to get down.
Ralph glanced at the man, smiled at him, and promptly complied, chagrined at his failure. As he entered the little room the captain eagerly questioned him: "What did it say?" he asked.
"That fellow ordered me away before I could make out the figures," said Ralph, "but I'm going to try it again."
"How near was the liquid from the top of the glass tube?" asked the captain.
"Well, I should say about so far," repliedRalph, indicating space between his thumb and finger. "I guess it was about an inch."
"How long do you think the tube is?" asked the captain.
"I think it must be a foot long; probably more," was the answer.
"I asked you to give me an estimate of the length of the entire tube so as to give me some assurance that you knew the value of an inch. You were right; those tubes are twelve inches long. Now let me see; I ought to know what figures are an inch from the top!" remarked the captain thoughtfully.
"Pardon me, Captain, but how does it come that you know all about these boats?" asked Alfred.
"I used to be an officer on a French submarine," he replied in a quiet tone, and immediately proceeded to make certain mental calculations. Then he continued: "One inch below the top! That is twenty."
"Twenty what?" asked Ralph.
"Twenty feet; the Germans have the English foot on all their boats. I wonder they didn't think about that, and make a change before starting out."
"Maybe it's twenty meters," said Alfred, with a slight laugh.
"Oh, no," replied the captain. "That would be too Frenchy for the Germans. Besides, it would be too much by all odds. I am sure the conning tower is not more than twenty feet below the surface of the water."
"Then the stern of the submarine must be sticking out of the water," remarked Alfred.
"Unquestionably," replied the captain.
"How far, do you suppose?" asked Ralph.
"We can easily figure that out," said the captain. "Let me see; we must first get the angle at which the boat is lying."
The Entangled SubmarineThe Entangled SubmarineToList
The Entangled SubmarineToList
After looking about for some time he continued: "The door jamb is built in vertically; that is sure. A string, or piece of thread will make a plumb-bob; here it is: now let us see; according to the plumb line the boat is at an angle of 33 degrees, as nearly as our imperfect device indicates. There, now this line A shows the top of the boat and B the base of the conning tower. A line C, from the top of the water to the center of theconning tower, measuring 20 feet, shows where the water line is. Do you understand how I am doing it?"
"That is very plain," said Alfred, "and it is an interesting way to get at it, too. Then how far is the tail of the boat out of the water?"
"I should say it is about nine feet," replied the captain.
"No wonder the propellers didn't do any good when they sent them spinning!"
"There is one thing I forgot about," said the captain, as he shook his head. "Why didn't I tell you to note the time. We are in the greatest danger, I fear."
"Why, what makes you think so?" asked Ralph.
"This accident happened during the night, and we have now been in this condition for at least four hours. If we are caught here at daylight it is all up with us," remarked the captain.
"Why, is it any more dangerous then than now?" asked Alfred.
"Because the patrol boats and submarine chasers will spy us, and then a shot, and all will be over," replied the captain with a solemn voice.
"Then I think we ought to do something right away," said Ralph, as he half rose and glanced out.
"I am afraid that will put the burden of getting out of the nets on our shoulders," replied the captain. "No, let them work at it, as long as they care to, but we must try by some means to determine the time."
"Do you think the seamen would object to telling us?" inquired Alfred. "Just let me alone; I am going to try it on, anyway," he said, as he slipped out of the door, picked up a box and stowed it away snugly at one side out of the way of a young fellow who was making his way up the incline toward the stern.
Alfred struck up a conversation, and asked: "Can I help you in any way? Tell me what to do."
The request seemed to warm up the fellow, and the information was given that the officer had instructed him to remove the stray boxes from the machinery. The two engaged in this work for more than fifteen minutes. Finally Alfred said: "How are you, pretty tired? You haven't had much sleep so far?"
"Oh, no; but we're used to that," he replied, "why, in the last run we had hardly an hour's sleep in the last four days before reaching port."
"That must be very trying," rejoined Alfred. "But it must be near daylight."
"It is just about an hour off; and when the day comes I don't know what will happen," remarked the seaman.
"Why, what are you afraid of?" asked Alfred, appearing to be greatly alarmed.
"They have caught us this time for good, as I heard the lieutenant,——"
The sentence was never finished, for at that moment there was another rasping sound, and the stern of the boat came down with a sudden spring,then rebounded, and after two or three oscillations, rested quietly in the water, still at quite an angle.
The sub-lieutenant sprang toward the conning tower as fast as he could scramble. The signal was given to reverse, the motors began to hum and the ship vibrated. It was a glorious feeling, and the captain grasped the hands of the boys in an ecstacy of joy.