"This is insufferable!" he cried.

Blake coolly filled his pipe.

"There's no other remedy. Before I go to sleep, I'll picket the horses close beside me; and if you steal away on foot during the night, I'll ride you down a few hours after daybreak. I think you understand me. There's nothing more to be said."

He tried to talk about other matters, but found it hard, for Benson, tormented by his craving, made no response. Darkness wrapped them about and the prairie was lost in shadow. The leaves in the bluff rustled in a faint, cold wind, and the smoke of the fire drifted round the men. For a while Benson sat moodily watching his companion, and then, wrapping his blanket round him, he lay down and turned away his head. Blake sat smoking for a while, and then strolled toward the horses and chose a resting-place beside their pickets.

Waking in the cold of daybreak, he saw Benson asleep, and prepared breakfast before he called him. They ate in silence, and then Blake led up the pony.

"I think we'll make a start," he said, as cheerfully as he could.

For a moment or two Benson hesitated, standing with hands clenched and baffled desire in his face; but Blake looked coolly resolute, and he mounted.

CHAPTER IX

A SUSPICIOUS MOVE

When Benson and Blake rode into the camp, apparently on good terms with each other, Harding made no reference to what had occurred. He greeted them pleasantly, and soon afterward they sat down to the supper he had been cooking. When they had finished, they gathered round the fire with their pipes.