"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 is headed this way—-hundreds strong, and it's going to rush through this camp, trampling everything in the way!"