Roswell and Frank were sure that in all their lives they were never so tired. Leaving the three men to talk and smoke, they stretched out on their blankets, wrapping themselves in them, and almost immediately sank into deep, dreamless slumber.

The sleep had lasted perhaps a couple of hours, when, without any apparent cause, Frank Mansley awoke in the full possession of his senses. Lying motionless, he listened to the soft breathing of his cousin beside him, while the regular respiration of the men left no doubt of their condition. Everything around was in blank, impenetrable darkness and all profoundly still.

"It's strange that I should awake like this," he thought, slightly shifting his position. "I'm tired, and was so drowsy that I felt as if I could sleep a week, but I was never wider awake than I am this minute—"

Amid the all-pervading silence he was sensible of a low, solemn murmur, like that of the distant ocean. At first it seemed to be the "voice of silence" itself, but it steadily increased in volume until its roar became overpowering. Startled and frightened, he lay still, wondering what it could mean, or whether his senses were deceiving him. Then he suddenly remembered the vast masses of ice and snow which towered above them all through the day. He recalled the stories he had read of the glaciers and avalanches, and how Tim McCabe had referred to them as sometimes overtaking travellers in this part of the world.

He knew what it meant, and, leaping from his couch, he shouted:

"Wake up! Quick! An avalanche is upon us!"

CHAPTER V.

THROUGH CHILKOOT PASS.

As Frank Mansley's words rang through the tent they were followed by the awful roar of the descending avalanche, and all awoke on the instant. But no one could do anything to save himself. They could only cower and pray to Heaven to protect them.