The cliffs upon the farther side had lost their ruddy tint, being chocolate-brown in color; the vegetation was more scattered along the top of them, and they had sunk to three or four hundred feet in height, but in no place did we find any point where they could be ascended. If anything, they were more impossible than at the first point where we had met them. Their absolute steepness is indicated in the photograph which I took over the stony desert.
"Surely," said I, as we discussed the situation, "the rain must find its way down somehow. There are bound to be water-channels in the rocks."
"Our young friend has glimpses of lucidity," said Professor Challenger, patting me upon the shoulder.
"The rain must go somewhere," I repeated.
"He keeps a firm grip upon actuality. The only drawback
