Suddenly he stopped, and with a half shout he gesticulated excitedly to his companions.

Something in his manner took Rod and Mukoki to him on the run.
When they came up the Indian youth stood mutely pointing at something in the sand.
Clearly imprinted in that sand was the shape of a human foot, a foot that had worn neither boot nor moccasin when it left its trail in the lake bed, but which was as naked as the quivering hand which Wabigoon now held toward it! And from that single footprint the eyes of the astonished adventurers traveled quickly to a hundred others, until it seemed to them that a dozen naked savages must have been dancing in these sands only a few hours before.
And Rod, glancing toward the driftwood, saw something else,--something toward which he pointed, speechless, white with that same strange excitement that had taken possession of Wabigoon!.