The chance to try if they could track any one on the prairie appealed to the others, and they started to ride around the pool.

"I can see where they had a camp fire!" cried Tom, pointing toward a pile of white ashes.

"Here's where the grass is all tramped down. Look, there's a regular path right for the mountains."

"No, this is the way they went, to the south, here," returned Larry.

Each boy was firm in his declaration that he had found the trail and to prove it they dismounted and began to examine the ground.

"I'm right. I can see horse tracks!" cried Larry. "This is the way they took, isn't it, Ned?" Thus appealed to, both Horace and the man rode up.

"Larry's right," announced Ned, after a few moments observation,

"Then what caused my tracks?" demanded Tom. "Here are horse tracks, too, only most of the hoofprints are made by cattle."

"Oh, you can't tell a cow from a pony print," taunted Horace.

"Come over and see for yourself," retorted Tom.