He got out and we hunted for the path with the lantern. He said there was only one path and that it was but vaguely defined. We could not find it. The lava surface was all alike in the lantern light. But he was an ingenious man. He said it was not the lantern that had informed him that we were out of the path, but his feet. He had noticed a crisp grinding of fine lava-needles under his feet, and some instinct reminded him that in the path these were all worn away. So he put the lantern behind him, and began to search with his boots instead of his eyes. It was good sagacity. The first time his foot touched a surface that did not grind under it he announced that the trail was found again; and after that we kept up a sharp listening for the rasping sound and it always warned us in time.

It was a long tramp, but an exciting one. We reached the North Lake between ten and eleven o’clock, and sat