He was arrested by three half-naked Indians, who, in an unintelligible language, but plainly to be understood gestures, commanded him to follow. This he prudently acquiesced in, but not until he had, as he thought, ascertained the dividing ridge between the Atlantic and the Pacific to be 272 feet above tide. Falling asleep, with a contented mind, he thought he heard the roar of the surf of the Pacific, but his companion, Ford, very shrewdly suggested that they were still within hearing of the Atlantic. With a gentle admonition that they must never be caught there again they were permitted to return to their boat. Naturally, he could not forbear another fling at the helpless Dr. Cullen. “I had not much faith in Dr. Cullen’s map, as his descriptions of land south-west of Port Escocés were directly contrary to the fact.” The comment, on his failure may puzzle the reader. “I am far more satisfied at having failed in crossing from Port Escocés than to have crossed and returned (supposing that was possible with safety), and reported a summit 275 feet, when, within a few miles, one of 40 is to be got further inland.” “It is dangerous to argue by induction,” observes Mr. Gisborne, and he gives 238 pages in illustration of this truth. Nothing daunted by his failure to effect a transit from the Atlantic side of the Isthmus, he determines to proceed to Panama, and to make another attempt from San Miguel on the Pacific. Proceeding up the Savana river he disembarked with his Asst. Ford, who had charge of the mountain barometer, and penetrating two days’ journey into the interior, he is warned by a _log over a stream_ that he had reached the country of his enemies, the Caledonia Indians. Remembering their parting injunction he returned. “A dreamy hope of success,” he writes, “is strengthened by inductive argument, the cause of former failures leads to generalizations of geological theories, and topographical analogy, and it was this conviction that cheered me under all difficulties, making suffering an indispensable appendage of success.” Consoling himself with such reflections he met Dr. Cullen at Panama, in high dudgeon. The Doctor reproached him with having broken his instructions, and required that he should return to San Miguel. Gisborne was recalcitrant. “Feeling satisfied that a ship canal could be made across Darien, he urged Dr. Cullen to come to England, and, as he said he was without money, I offered to advance the passage money.” This generous offer was accepted. Having found, as he believed, a summit of 150 feet above tide, corresponding with Dr. Cullen’s statement, he submits two plans to his employers. One for a thorough-cut without locks; the other by the junction of two lakes, for which he had found a suitable physical conformity, in remarkable harmony with his prophetic speculations before reaching Cartejena. The first plan was estimated to cost £12,500,000, or about $62,500,000.