POSTSCRIPT.
Since the foregoing pamphlet was in print, an Article has appeared in the Morning Chronicle of the 16th May, 1845, in which it is alleged, upon the authority of an Article in the Journal des Debats, that M. Garella has given in his Report to the French Government, and that he reports in favour of the practicability of the scheme, but that he found the lowest elevation between the two oceans to amount to, from 120 to 160 metres, and that this being, as he says, too great an elevation for a Ship Canal, he proposes an enormous Tunnel capable of allowing Frigates to pass through—that he thinks from examination of the soil, that a Tunnel of 100 feet in height above the surface of the Canal will be practicable, and might be made with a reasonable outlay of money; and that the length of the Tunnel would be 5,350 metres, and the expense of it about 44 millions of francs (£1,760,000).
It is impossible to read this statement without feeling a strong suspicion that, for some object which does not appear, it is the wish of the French Government, or those who have put the statement forth, to deter others from embarking in the formation of a Canal across the Isthmus of Panama; for the recommendation of a Tunnel of 5,350 metres (about three miles) in length, and 100 feet in height, is not only preposterous in itself, as applied to a Ship Canal, but is wholly at variance with M. Garella's own letter to the Governor of Panama (ante p. 26), and with the statement of his opinions in the Article in the Moniteur Parisien (ante p. 23), which Article is believed to have been written by himself. It is true that M. Garella, being a Mining Engineer (Ingénieur des Mines) may have a partiality for subterraneous works; and this refection provokes the observation, that it is singular that the French Government should have selected, for this very important survey, an Engineer of Mines (however eminent in his department), rather than one experienced in the formation of Canals, when it had so many of the latter at command.
It is difficult to conceive that the writer of the letter to the Governor of Panama, and of the Article in the Moniteur Parisien can be sincere in recommending a Tunnel; and the conclusion is irresistible, that if the Article in the Debats has any foundation in the forthcoming Report, it is a stroke of policy on the part of the French Government, to discourage an undertaking which its own subjects have not sufficient enterprize to accomplish, and which it would object to see executed by other nations.
In the present state of the question, it may not be immaterial to remark, that on a comparison lately made by an English Engineer of Mr. Lloyd's levels, with the survey alleged to have been made by M. Morel (the accuracy of which is necessarily impugned by M. Garella, if he asserts that an elevation of 120 metres must be overcome), it appears that the levels ascribed to M. Morel, very nearly agree with those of Mr. Lloyd, and are substantially corroborated by his survey.