Nearly all this had taken place before the three spectators heard the deep, thunderous roar that rolled across the space and told of the stupendous mass that had been loosened by the undermining rays of the sun or by some trifling disturbance of the atmosphere.

"If we should be caught in anything like that," said Victor, "it would take us a good while to dig out."

"My brothers might never dig out," said Deerfoot.

"What is there to hinder?"

"There are many stones and rocks and boulders tumbling about in the snow, and they would be likely to kill us."

"Then, Deerfoot, you must keep your eyes open for avalanches. It would be pretty hard for the horses, though Zigzag has sort of got used to it."

Little need for warning the Shawanoe of his duty. That was what he had been attending to all his life. He had never placed himself and friends in the way of an impending avalanche. Recalling their course since leaving the village, the brothers understood better than before the cause of more than one tortuous winding by their guide, when they had been unable to guess the reason for such quixotic turns that did not lessen the labor of traveling itself.

It was not yet midday, and the halt was not made for food for either man or beast. In truth, grass was so scarce, except here and there in the sheltered nooks and depressions, that some dependence would have to be placed for awhile on the barks of trees. Zigzag showed a meekness that roused distrust on the part of the boys. He must have found the heavy pack quite onerous, but he did not rebel. Whirlwind showed little lessening of his aristocratic tastes, and refused to mingle on anything like equal terms with the common stock around him.

When Deerfoot and his companions were journeying westward they decided to return by a different route from the Blackfoot country. Their first intention was to travel eastward until they reached the upper waters of the Mississippi, and then make their way down that stream to civilization, following in a general way the course of the mighty stream. With their horses, and without large boats, they could not utilize the current, unless perhaps after descending a long distance they were able to construct a large raft.

This plan, which would have taken them through the hunting grounds of the Assiniboines, was changed, and they turned to the southeast, having been told that that course offered less difficulties to them. They gave up their former plan because of their wish to enter a moderate climate as soon as possible. Although spring was well begun, they had a good deal of snow and ice to encounter, and were likely to meet it for weeks to come. This was shown on their second day, when a driving storm of snow and sleet forced them to seek shelter for themselves and horses, and another day passed before they could resume their journey.