"Guess it was a false alarm," spoke Andy, in a relieved voice. Frank did not answer, but, creeping cautiously forward, he bent low to the ground, and looked carefully for some tell-tale sign in the fast-disappearing light.

"See anything?" asked Frank.

"Yes," replied Billy. "I see some marks."

"Was it a wolf?"

"No—a man!" came the unexpected reply.

"A man?" chorused the Racer boys.

"Yes. Fellows, we're not alone on Golden Peak, and we've got to be on our guard," and Billy's voice was a trifle solemn.

"Who do you imagine it can be?" asked Frank. "Some of those same men who are making trouble for your uncle?"

"I shouldn't be surprised," said Billy, as he laid aside his gun. "They can't help but see the work going on at the dam, and they know what it means—the burying of Golden Peak under many feet of water. So they may be making a final effort to get at the treasure."

"And they may not like it that we are here," suggested Andy.