And who were these raiders? At Thompson's she had heard Monk Bethune's name mentioned in connection with possible horse-thieving. Bethune had spoken of hurried trips, "to the northward." She remembered that upon the occasion of their first meeting, she had heard him dickering with Watts for the rent of his horse pasture, and she recollected the incident of the changed name. Then, again, only a few days before, she had parted with him when he struck off the trail to the eastward with the excuse that he was going over onto the east slope on a matter having to do with some horses. Bill had mentioned, in talking to Mrs. Samuelson, that he had been riding through the horses on the east slope. Could it be possible that the suave Bethune was a horse-thief? On the other hand, Bethune had openly hinted that Vil Holland was a horse-thief--and yet, these other people all believed that he was persistently on the trail of the horse-thieves. For a long time she lay thinking, guessing, trying to recall little scraps of evidence that would bear upon the case. Again, a slight sound brought her to a sitting posture. This time it was the opening of a door across the hall from her room. The sound was followed by the soft padding of slippered feet in the hall, the low tapping, evidently at another door, a few low-voiced words, and a return of the padding steps. A few moments later other steps hurried along the hall past her door and rapidly descended the stairs. Patty heard the opening of an outside door, and once more stealing to the window she saw the Chinaman hurry across the moonlit yard to the bunk house and throw open the door. He entered to emerge a moment later and rush to the horse-corral, where he peered between the poles for a moment and then made his way swiftly back to the house. Without lighting the lamp Patty dressed hurriedly. Was the Samuelson ranch a place of mystery? What was the meaning of the light sounds--the soft tramp of horses, and the padding of feet upon the stairs? The footsteps paused at the door across the hall. There followed a whispered colloquy and the steps retreated rapidly to the lower regions. Patty opened her door to see Mrs. Samuelson, her face expressing the deepest agitation, and one thin hand catching together the folds of a lavender kimono. "What is the matter?" asked the girl. "What has happened?" The old lady closed the door from beyond which came sounds of heavy breathing. "I am afraid he is worse," she whispered. "Wong Yie went to the bunk house to send the boys for the doctor and for Mrs. Pierce, and he says they are gone! Their horses are not in the corral. I don't understand it," she cried. "I told them not to go away. They know, that with my husband sick, we are in momentary danger from the horse-thieves, and they know that their place is right here." "You told Bill to stay until he heard from Vil Holland," reminded Patty. "Maybe they heard from him, and left without disturbing you."