In the same moment a sharp cry from Father Roland startled him.

The dogs halted suddenly.

The creaking of the sledge runners ceased.
Father Roland had turned his face down the lake, and was pointing.
"Look!" he cried.
David jumped from the sledge and stared back over their trail.

The scintillating gleams of the snow crystals were beginning to prick his eyes, and for a few moments he could see nothing new.

He heard a muffled ejaculation of surprise from Mukoki.