Then even above the storm a deep roar was heard.
It grew louder and louder.

The wolves, as if struck with terror, leaped to their feet, and scattered on either way along the path at full speed.
"What sound can this be ?" Cnut exclaimed in an awe-struck voice.

"It sounds like thunder; but it is regular and unbroken; and, my lord, surely the earth quakes under our feet!" Louder and louder grew the roar.
"Throw yourselves down against the wall of rock," Cuthbert shouted, himself setting the example.
A moment afterward, from above a mighty mass of rock and snow poured over like a cascade, with a roar and sound which nigh stunned them.

For minutes--it seemed for hours to them--the deluge of snow and rock continued.

Then, as suddenly as it had begun, it ceased, and a silence as of death reigned over the place.
"Arise," Cuthbert said; "the danger, methinks, is past.