John Mangles and his two sailors acted as scouts, and went about a hundred steps in advance. They found out practical paths, or passes, indeed they might be called, for these projections of the ground were like so many rocks, between which the wagon had to steer carefully. It required absolute navigation to find a safe way over the billowy region.

It was a difficult and often perilous task. Many a time Wilson's hatchet was obliged to open a passage through thick tangles of shrubs. The damp argillaceous soil gave way under their feet. The route was indefinitely prolonged owing to the insurmountable obstacles, huge blocks of granite, deep ravines, suspected lagoons, which obliged them to make a thousand detours. When night came they found they had only gone over half a degree. They camped at the foot of the Alps, on the banks of the creek of Cobongra, on the edge of a little plain, covered with little shrubs four feet high, with bright red leaves which gladdened the eye.

"We shall have hard work to get over," said Glenarvan, looking at the chain of mountains, the outlines of which were fast fading away in the deepening darkness. "The very name Alps gives plenty of room for reflection."