The stream of cattle had now swept past them, and the thunder of their many hoofs was gradually growing less insistent as they passed on.

“Well, that was a queer sight, sure,” said Billie, rubbing his eyes, as though he hardly knew whether he could believe what they had told him or not.

Adrian was strangely quiet, Donald thought.

“Did you ever see a stampede like it?” asked Donald, determined to find out what the other chum’s opinion might be.

“I surely never did, if it was a real stampede,” returned Adrian, slowly, as if he might still be struggling to see light.

“Oh! it was that, all right, but not one brought about by a storm, nor yet by fear of wild animals,” Donald continued.

“Then you heard them too, did you?” demanded the other.

“What was that?” asked Billie, arousing to the

fact that he was somewhat behind, and never liking to be left out of a race through any handicap.

“Cowboys yelling like mad!” Donald went on to say, seriously.