Welcomed with the approving plaudits of his king and countrymen, or loaded with ignominious chains, he had ever kept one object constantly in view. This object, pursued with unexampled courage, self-abnegation, and constancy, he was now called on to renounce. Who will venture to depict the thoughts of this remarkable man as he turned to retrace his path, leaving behind him the prospect of discoveries far greater than those which had cast the hallow of immortal fame around his name?
“Here ended,” says Irving, in a strain of tender eloquence, “the lofty aspirations which had elevated him above all mercenary views in his struggle along this perilous coast”——“it is true, he had been in pursuit of a chimera, but it was the chimera of a splendid imagination and a penetrating judgment. If he was disappointed in finding a strait through the Isthmus of Darien, it was because Nature herself was disappointed.”
This sagacious conjecture has its foundation in nature, and is supported by the opinions of savans and the facts of recent geological explorations.
The Prussian geographer, Berghaus, as early as 1823, and Prof. Hopkins, contested the accepted opinion as to the unbroken continuity of the Isthmus and the contiguous continents.
The French engineer, Garella, after making a geological reconnoissance, declares that the Isthmus is of more recent origin than the continents which it unites. Col. Hughes and Garella concur in a belief in the existence, at an early period, of a strait uniting the Atlantic and Pacific oceans. The identity of the species of fish inhabiting the waters on both sides of the Isthmus is an additional argument in confirmation of this view.
It is without surprise that we find the discoveries of another science confirming this inference. Prof. Huxley, in a recent address on the progress of palæontology, is unable to explain the distribution of mammals at the close of the miocene period, except upon the supposition of a barrier which prevented the migration of the apes, rodents, and edentata from the southern to the northern continent. He cites the opinions of Carrick Moore and Prof. Duncan in support of the same conclusion. Further investigation will, no doubt, add to the number of facts which indicate the separation of the two continents by the ancient sea, and may even establish the fact that portions of Central America once formed parts of the Antilles group of the equatorial belt of islands.
General Michler, in his interesting report of the survey of the Atrato, observes: “All the stratified rocks on the Isthmus, exhibiting strong marks of disturbance and even dislocation since they were originally deposited, clearly prove that the upheaval which brought this narrow neck of land above the level of the ocean must have taken place at a comparatively late era. This period was undoubtedly accompanied by the protrusion of certain metamorphosed shistose (?) rocks, the doubtful nature of which has induced us to mark them as belonging to a trappean series. If Darwin had good reason to believe that the granite of South America, now rising into central peaks 14,000 feet in elevation, must have been in a fluid state since the deposition of the tertiary group, we may also do so in pronouncing the formation of the Isthmus, now linking together South and Central America, as decidedly post-tertiary.”
The deductions of Columbus were, however, based on the direction of the coast of Cuba, which he supposed to be a continent, and the parallel coast of South America; and was further confirmed by the westerly current flowing between them, which must, he thought, find an outlet near Darien.
These bold generalizations, drawn from stores of profound observation and varied reading, although we now know them to be erroneous, evince the sagacity of the man, and place him far ahead of the intelligence of his age. With heartfelt sorrow he reluctantly renounced a chimera so plausible, which he expected would lead him to the fabulous kingdom of Prester John, or, perhaps, to the marvelous splendors of the imperial dominions of Kublai Khan, and which would, he believed, open new fields for the peaceful conquests of the banner of the Redeemer.
The delusive representations of travelers was the chief impulse to some of the greatest achievements of the fifteenth and sixteenth centuries.