- [Footnote: Chagres to be made in 1828 and 1829 by Lloyd and
Falmarc. (Philosophical Transactions of the Royal Society of London for the year 1830, p. 59-68.) Other measurements have since been executed by accomplished and experienced French engineers, and projects have been formed for canals and railways with locks and tunnels, but always in the direction of a meridian between Portobello and Panama,—or more to the west, towards Chagres and Cruces. Thus the most important points of the eastern and south-eastern part of the Isthmus have remained unexamined on both shores! So long as this part is not examined geographically by means of exact but easily obtained determinations of latitude and of longitude by chronometers, as well as hypsometrically in the conformation of the surface by barometric measurements of elevation,—so long I consider that the statement I have repeatedly made, and which I now repeat in 1849, will still be true; viz. "that it is as yet unproved and quite premature to pronounce that the Isthmus does not admit of the formation of an Oceanic Canal (i. e. a canal with fewer locks than the Caledonian Canal) permitting at all seasons the passage of the same sea-going ships between New York and Liverpool on the one hand, and Chili and California on the other."
On the Atlantic side (according to examinations which the Direccion of the Deposito hidrografico of Madrid have entered on their maps since 1809) the Ensenada de Mandinga penetrates so deeply towards the south that it appears to be only four or five German geographical miles, fifteen to an equatorial degree, (i. e. 16 or 20 English geographical]*
