thick brushwood between. In the damper hollows the Mauritia palms threw out their graceful drooping fronds. We traveled entirely by compass, and once or twice there were differences of opinion between Challenger and the two Indians, when, to quote the Professor's indignant words, the whole party agreed to "trust the fallacious instincts of undeveloped savages rather than the highest product of modern European culture." That we were justified in doing so was shown upon the third day, when Challenger admitted that he recognized several landmarks of his former journey, and in one spot we actually came upon four fire-blackened stones, which must have marked a camping-place.
The road still ascended, and we crossed a rock-studded slope which took two days to traverse. The vegetation had again changed, and only the vegetable ivory tree remained, with a great profusion of wonderful orchids, among which I learned to recognize the rare Nuttonia Vexillaria and the glorious pink and scarlet blossoms of Cattleya and odontoglossum. Occasional brooks with pebbly bottoms and fern-draped banks gurgled down the shallow gorges in the hill, and offered good camping-grounds every evening on the banks of some rock-studded pool, where swarms of little blue-backed fish, about the size and shape of English trout, gave us a delicious supper.
On the ninth day after leaving the canoes, having done, as I reckon, about a hundred and twenty miles,
