════════╤═════════════════╤════════╤═════════════════════════════════ │ │ SUMMIT │ NAMES. │ LOCALITY. │REPORTED│ REMARKS. ────────┼─────────────────┼────────┼───────────────────────────────── │ │ FEET. │ Cullen │Savana, │ │ │ Port Escocés.│ 150? │“Crossed and recrossed?” Gisborne│ “ “ │ 150? │ Saw across to former position? Cullen │ ┌ Started at │ 980! │ ┌ Second attempt Gisborne│ ┤ Caledonia │ │ ┤ and failed to │ └ Bay. │ │ └ cross over. Strain │ Caledonia Bay. │ 1000+ │ Lost his way on the Chuquanaqua. Prevost │ Savana River. │ 1080 │ Did not see the Pacific. Bourdiol│ “ “ │ 597? │ Turned back by rain. ────────┴─────────────────┴────────┴───────────────────────────────── It would appear, at the first glance, that the question of a practicable route across the Isthmus of Darien was settled by these explorers.[8] Dr. Cullen, notwithstanding the unfortunate result of his early prognostications, still remains sanguine, and opines that the valleys of the Aglatomente and Aglasenaca afford levels favorable to a canal; but Gisborne’s map represents the water-shed of the Aglasenaca at 1,020 feet above the level of the sea, and supplies no indications of a lower summit. But Capt. Prevost gives some important testimony. In a letter to Admiral Moresby, written after the return of his expedition, he speaks of valleys at a lower level than any yet discovered, leading to the Pacific. His map confirms this statement. Capt. Parsons, R. N., of the Scorpion, testifies to the same effect. From the deck of his vessel he could discern a very decided break in the ridge, which appeared continuous when viewed from other points. These estimates we have learned to receive with caution. “A dreamy hope of success is strengthened by inductive argument,” observes Mr. Gisborne, “the cause of former failures leads to generalizations,” etc., and such faint lights have so far proved veritable will-o’-the-wisps. In the present instance, concurrent opinion is highly favorable. The appearance of isolated summits, and disjointed and dislocated character of schistose and trychitic rock; the testimony of Prevost and Parsons, to the appearance of a break in the ridge; the fact that Col. Hughes found at Panama a summit of two hundred and eighty feet above the sea, at two miles north of the line, upon which Garella could not find less than four hundred and fifty-nine feet above the same level; all these facts, if not “confirmations strong as proofs of Holy Writ,” are more than “trifles light as air,” and go far to confirm the opinion that the Isthmus of Darien has not been sufficiently explored. SAN MIGUEL TO THE GULF OF URABÀ.