"You're taking the dogs?"

"Yes."

Sandy lighted his pipe, and spoke like one strangely curious.

"Must cost a heap to take these trips o' yourn, don't it?"

"My last cost about seven thousand dollars. This will cost five," said McGill.

"Gawd!" breathed Sandy. "An' you carry all that along with you! Ain't you afraid—something might happen—?"

The little professor was looking the other way now. The carelessness in his face and manner changed. His blue eyes grew a shade darker. A hard smile which Sandy did not see hovered about his lips for an instant. Then he turned, laughing.

"I'm a very light sleeper," he said. "A footstep at night rouses me. Even a man's breathing awakes me, when I make up my mind that I must be on my guard. And, besides"—he drew from his pocket a blue-steeled Savage automatic—"I know how to use this." He pointed to a knot in the wall of the cabin. "Observe," he said. Five times he fired at twenty paces, and when Sandy went up to look at the knot he gave a gasp. There was one jagged hole where the knot had been.

"Pretty good," he grinned. "Most men couldn't do better'n that with a rifle."

When Sandy left, McGill followed him with a suspicious gleam in his eyes, and a curious smile on his lips. Then he turned to Kazan.