A rod farther the depth had not materially increased, and, turning his head, he signified to his wife to follow. She clasped Dot a little closer to her breast, spoke quietly to her animal, and he obeyed without faltering. The water steadily but slowly deepened, and when the middle of the stream was reached it was at the stirrups of the leader. He withdrew his feet and pushed on, the pony cautiously advancing, and the hope growing that the stream would be forded without trouble. A rod farther, and Mrs. Starr uttered a slight exclamation. She saw the steed of her husband suddenly sink, and thought he was going entirely under. But he did not, and, by a quick raising of his feet, the rider saved them from wetting. His animal still retained a firm foothold, and, quickly recovering, kept forward. Now the water began shallowing, and, with a relief beyond words, the rancher reached dry land without having suffered any inconvenience. "Thank Heaven!" he exclaimed, turning about and watching his wife, who guided her animal over the invisible trail until she was beside him on the hard earth. It required no little skill on her part, for when she withdrew her foot from her stirrup, and was obliged not only to hold her own poise, but to take care of Dot, her task became delicate and difficult. But the little one behaved like a heroine. She did not speak or stir, through fear of disturbing her parent, and was as relieved as both when the current was safely forded. "Are there any more like this?" asked the wife. "There are other streams, but whether they can be forded or not remains to be learned." The bank sloped upward to a height of a dozen feet, and beyond it declined nearly as much, and then stretched away in an open plain for more than a mile, before breaking into rough, rocky country, where they were quite sure to find greater obstructions confronting them than any yet encountered. "Oh, see there!" called out Dot. Flakes of scurrying snow were in the air, and her father supposed she referred to them. "Yes," he replied, "we shall have to ride for a while through a snow storm." "I know that, but it isn't what I mean; yonder is someone following us." Her position in the arms of her mother gave her opportunity to look back over the stream they had just crossed, while the attention of her parents was directed elsewhere. Her words caused both to glance behind them, where they witnessed a startling scene. A Sioux Indian, astride of a pony, had halted with the fore feet of the animal in the margin of the water. Directly behind him was a second horseman, advancing slowly, and immediately to the rear of him appeared a third, while the head and shoulders of a fourth were rising to view over the bank in the path of the others. And there was no saying how many others made up the procession, streaming toward the ford in the footsteps of the fugitives. "Molly," said Mr. Starr, in a low voice, "ride over the top of the hill as quickly as you can."