The whole landscape was flooded by the brilliant slice of moon which hung far over in the sky, and the professor drank in its beauty. The cook had finally cleared up everything in the kitchen and gone out to the small bunkhouse, to listen for a time to the guitar which Yappi was playing and then finally to coax the old mestizo into playing a game of cards with him, over which they droned half asleep, seriously intent. When Professor Scott had finished his pipe he knocked out the ashes, yawned and with a final look around, went to his room.

This was in the back of the long, low building, facing the plains and mountains. He opened the window and finding that there was enough light from the moon, extinguished the lamp which he had lighted and took off his necktie. His eyes wandered dreamily over the landscape. Then he suddenly stopped unbuttoning his collar, his eyes narrowed, and he became all attention.

On the top of a sand dune a man was standing and looking toward the ranch. It was only for an instant and then the man disappeared, slipping down the other side noiselessly. He had on a cape and a sombrero, and the professor was puzzled. He wondered if Yappi or the cook had left the place, and after a moment of thought he went back to the front porch and looked around. There was no light in the bunkhouse now. But when he started to go out there he saw the cook walking toward the kitchen door and the ranchman coming out of the barn.

His first impulse was to speak to Yappi, but thinking it useless to alarm the man he returned to the house and to his room. It was not either of the men whom he had seen, but some stranger who was carefully looking down on the ranch. It was possible that it was only some chance wayfarer who had topped the rise and was examining the ranch, but the professor knew that Sackett was in the neighborhood and that it would be well to keep his eyes open. For an hour he looked steadily out of the window, but he saw nothing more to alarm him, and at last, after making a tour through the house and locking every door and window, including the window in his bedroom, he went to bed and soon fell asleep.

When morning came he was awakened by the sound of the cook trying the back door, and he hastily opened it for the Indian. The cook answered his cheery morning greeting unemotionally. The Indian had never known Ned to lock the doors, and he wondered why the older man did it, but no sign of his thoughts appeared on his shiny dark face and he set about getting breakfast ready. The professor dressed and then sat down to his morning meal, after a hasty look around to see that all was well.

Yappi had already attended to the horses when the professor went out to take a walk around the ranch, and the mestizo was busy in the barn. After enjoying the clear morning outside the professor went back to the house and once more resumed his reading, sitting in the window through which the sun came brightly. From where he was sitting he could see Yappi at work on a saddle, mending a flap on it, sitting on the low doorstep of the bunkhouse.

The professor had read for perhaps a half hour and was in the act of turning a page when he happened to look up and out at the old mestizo. The man had ceased his stitching and was looking back of the house, the saddle hanging loosely in his hand. And to the professor’s vast astonishment, he suddenly tossed the saddle over his shoulder and with the agility of a cat rolled himself without rising into the doorway of the bunkhouse.

Struck with amazement at the man’s actions the teacher put down his book and got up, striding for the front door. But even before he reached it he heard the back door pushed open and he turned. His worst fears were realized when he found Sackett standing on the threshold, a rifle in his hand, and Abel just back of him. Both men were smiling in triumph, but keeping a wary eye on the house just the same.

“Ah,” said Sackett, grinning broadly. “We didn’t know you was going out the front door, governor! Or maybe you was goin’ to let us in?”

“What do you want here?” asked the professor, stiffly.