Ah! he saw something suggestive. The glass was pointed toward the spot and instantly confirmed the unaided eye. In the horizon, in the mist of a stretch of wooded country, he observed a faint, almost invisible line of vapor climbing upward into the cold blue sky, and gradually dissolving, until at the height of a hundred feet or less all trace of it vanished. The most careful scrutiny could not tell anything more. The spot was between fifteen and twenty miles away, with the roughest sort of country intervening. It was a good day's journey distant, but in the same moment that Deerfoot made his interesting discovery he resolved to thread his way to the place without a minute's halt on his part until he reached his destination. His quick mind instantly saw several explanations of the "sign." It could not be the Nez Perces riding north, for it was impossible that they had lagged to such an extent on the road. If it was Amokeat and his party, they must be returning from their raid, or hunting expedition, or whatever had engaged their energies. It would seem more likely that the Indians belonged to some other tribe. Be that as it may, the only means of answering the question was by finding out for himself, and that Deerfoot started to do with the grim, unshakable resolution of his nature. With all his matchless swiftness and endurance, he would not have been able to travel the distance until the night was well advanced; for, though there were numerous places where he broke into his fleet lope, and more than once rose to a higher pace, he was compelled to make detours that greatly lengthened the distance and added to the labor. Again, a moderate walk was the best he could do.