closer every minute."

"What's behind the cloud? Can you make out?" Greg bawled up.

"I'm trying to see," Dick replied. "There, I got a glimpse then.
It's some kind of animals, heading for this camp at a gallop."

"It can't be cavalry," shouted Reade. "You don't see any men,
do you?"

"No," Prescott called down, shielding his eyes with one hand.
"Say, fellows!"

"Have you guessed what it is?" demanded Harry Hazelton.

"I know what it is---now!" Dick answered. Then he began to descend
the tree with great speed.

"Careful, there!" shouted Tom Reade. "That isn't a low baluster
you're sliding down."

"Keep quiet, until I reach the ground," gasped Dick. As he came
nearer those below saw that he looked truly startled.

Then Dick reached the low branches, and began to look for a chance
to jump.

"We've got to get out of here, fellows!" he called. "You know
the trick that cattle---owners have in this part of the county
of turning their cattle out to graze in one bunch. That bunch