"Mysteries have a fascination for me," she said; "I like to puzzle them out. But I must leave you now; for I promised to go see Evelyn this afternoon. I may not get home until late."
Half an hour later Beatrice was in the saddle riding across the bare sweep of prairie to one of the distant homesteads. When she reached the river, the stream was turbid and running fast, but a narrow trail through the poplars on its bank led to the ford, and she urged her horse into it fearlessly. On the other side the trail was very faint, and a stake upon a rise indicated where the crossing was safe. A large grass fire was burning some miles away, for a tawny cloud of smoke trailed across the plain.
Beatrice spent a pleasant hour with her friend and started home alone as dusk was falling. The sky was clear, and the moon hung some distance above the horizon. A cold breeze had sprung up, and the grass fire had grown fiercer. Beatrice could see it stretching toward the river in a long red line; and after a while she rode into the smoke. It grew thicker and more acrid; she could not see her way; and her horse was getting frightened. When an orange glare leaped up not far away, the animal broke into a gallop, pulling hard, and after some trouble in stopping it Beatrice changed her direction. She was not afraid of prairie fires, which, as a rule, can be avoided easily, but this one would necessitate her making a round.
She found it difficult to get out of the smoke, and when she reached the river it was at some distance above the stake. She could not ride back, because the fire was moving up from that direction, cutting her off. She glanced dubiously at the water. It ran fast between steep, timber-covered banks. She did not think she could get down to it, and she knew there was only one safe ford. Still, she could not spend the night upon the wrong bank, and the fire was drawing closer all the time. Worse still, her horse was becoming unmanageable. She rode upstream for a mile; but the river looked deep, and the eddies swirled in a forbidding way; the bank was abrupt and rotten, and Beatrice dared not attempt it. In front, the moon, which was getting higher, threw a clear light upon the water; behind, the smoke rolled up thickly to meet her. The fire was closing in upon the stream. With his nostrils filled with the sting of the smoke, the horse reared and threatened to dash over the crumbling bank. Beatrice, realizing her danger, turned him back downstream and gave him the rein.
She did not hope to reach the ford—there was a wall of impenetrable fire and smoke between her and the stake; she could not attempt the river where the bank was so steep and the current so swift.
With her own eyes smarting, and her breathing difficult, Beatrice suddenly leaned forward and patted the trembling horse. He had not been able to run far with his lungs full of smoke, and he had now stopped in a moment of indecision.
"Good boy!" she coaxed, in a voice that was not quite steady. "Go a little farther, and then we'll try the river."
"Hello!" came out of the darkness; and through the acrid haze she saw a man running toward her.
She hailed him eagerly; but when he reached her she was somewhat disconcerted to notice that he was not, as she had expected, one of the Allenwood settlers.
She saw that he was waiting for her to speak.