Exclusiveof specie—the amount of which, from the western coasts of America, cannot be less than 10,000,000 dollars yearly to Great Britain, and perhaps half as much to the United States. The value of British imports from Western America is not given in the official tables in any tangible shape, and therefore the imports are taken to be the same as the exports. The amount of imports from China is taken correctly from the tables; and the value of all the rest, as near as possible, from the same tables, in proportion; the whole being entered to all countries east of the Cape, China excepted; but in this amount also the amount for freight and charges should, it is thought, be added. The proportion of foreign and colonial produce, &c. to British manufactures exported, is, according to the official tables, as near as may be, the proportion taken. The value of the whole British trade to the places specified, may therefore be fairly taken at 17,500,000l.exports and imports, and exclusive of the profits thereon.
Next comes the trade which the United States have with all these places. In this there are more precise data, as the value both of exports and imports is given in their tables; but it may be observed, that the amount, both as regards imports and exports, is given exclusive of freights and charges, which in almost all the articles carried is greater in proportion, as regards the American trade, than in British produce and manufactures. It may also be observed, that the whole trade which the United States have with all countries to the eastward of the Mauritius, would pass through, and return through, the communication made in central America, as the nearest and the best route for them. The following was the trade and tonnage of the United States with the places specified in 1835:—
To the above should be added all the specie sent both by Great Britain and the United States to the Eastern World, particularly to China, to purchase cargoes, from the States alone about 7,000,000 dolls.; also all the tonnage which goes, or would go, from one coast to another in the three republics of Venezuela, Guatemala, and Mexico. To these states, such a communication would prove of inestimable value, and tend very greatly to add tothe revenue to be obtained from the traffic by it. There are other nations, also, besides Great Britain and the United States, which traffic with the quarters of the world already specifically alluded to, particularly France, Spain, and Holland; but no accurate account of such trade has hitherto come in the writer's way; though, taken collectively, it must be to a considerable amount. Moreover, the whole trade between Holland and Java, and between Spain and the Philippine Islands, would pass by the channel under consideration, and the trade which both nations has with these places is well known to be very considerable.
Such as it has been described is the trade at this moment; a sure foundation upon which the magnificent undertaking under consideration would, at the outset, have to build. The increased and increasing communications through the grand thoroughfare goes beyond calculation, and would most certainly exceed every thing that ever has been seen, or that ever can be witnessed, in any other portion of this globe. The trade of mighty empires would sink into insignificance, when compared, in all their present magnitude, with what it would become one hundred years hence. Admitting that it cost 1,000,000l.to complete the navigable communication, (and there are good grounds to believe that it could be done for one-half of the sum,) the question or point next to be considered is, what would the revenue be, which could be derived from it? To exact a per centage on the value of the commerce which passes through it would be uncertain, and liable to evasion, and consequently give much trouble, and occasion much vexation; and therefore it would be best to exact so much per ton, the exact extent of which the register of each ship or vessel so passing through the canal would at once and readily determine. The question is, What should the sum so levied, or the toll, actually come to be? Ten shillings per ton would certainly be a moderate sum; and taking it so it will be shown how it will pay at the outset.
Thus affording from the outset a fair and profitable return, and which may reasonably be expected to be doubled in a very few years afterwards.
Hitherto the matter has been considered entirely as relates to the practicability and probable expenditure to be incurred in carrying the Plan into effect, and the remuneration to be obtained from the Plan when completed. It yet remains to show the advantages which will be obtained in the courses and distances by this route, as compared with other routes, and also with the route by the North Pole—even were this latter practicable throughout the year, but which it almost certainly is not. It has elsewhere been shown how a communication across any part of this Isthmus, even by an ordinary road, can be made to extend, and to accelerate the mail communications between Great Britain and all the western coasts of America, and more especially with the most eastern parts of the eastern world, and her own rising empire in New Holland. Nothing calls forth the enterprize and the energies of mankind, equal to the rapidity and regularity of correspondence: and without this, no country can either improve or advance in cultivation or civilization.
The comparative distances by the several lines of communication will stand as follow:—
Thusit is evident, that were the passage over the North Pole open and practicable at all seasons, but which it is not, the route by it would be so much shorter for every part from Europe to the ports in Asia and in America, situated on the Northern Pacific, as to be vastly preferable; but when it is recollected that this passage can only be open for a very few months in the course of the year—and also considering the winds and the weather which, during that brief space of time, would certainly be met with in the northern route, and the utter impossibility that there would be of procuring any assistance in that route, should accidents occur,—it is clear, that vessels would almost as speedily, and certainly much more safely, run over the distances by the western route, even to the places more near; while, as regards those which are more distant, there can and need be no comparison drawn.
It will also from these references be observed, that the distances to all the eastern parts of Asia, and the north-west coast of America, are, with a very few exceptions (in these, too, the distances are nearly equal), nearer than the distances would be, either taken by the Cape of Good Hope or Cape Horn, the only routes always open; while, considering the winds and the seas which are met with in either of these routes, it is plain that ships would run over the distance by the western route through central America, even to the most distant parts in eastern Asia that have been adverted to, sooner and much easier than they could do by either of the former. The saving of insurance alone in the route by the mild tropical climates, and also of wear and tear in ships by the same channel, compared to what all these would amount to in the navigation by the other routes, to say nothing of the saving of time in voyages, would be objects of great importance to commercial and nautical men.