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 down on a huge overhanging lava-shelf, tired but satisfied.

The spectacle presented was worth coming double the distance to see.