Matt took a folded paper out of his pocket.

"What is it?" inquired Clip, stepping to Matt's side.

"Just a minute, Clip," said Matt. "Did I tell you that Dangerfield gave me a note, there in the notch, on our way to Phœnix, and told me to read it any time after we reached town?"

Clip nodded.

"Well, I just read that note an hour ago. Most of the things we couldn't understand about Dangerfield have been cleared up, but here's a new mystery."

"You say it concerns me?" asked Clip, surprised.

"In a way, yes. Read it, and you'll see how."

Clip opened the note. It ran as follows:

"Motor Matt: In a few days one of my men, named Pima Pete, will try to get your help in a certain undertaking. It's an honest undertaking, too, and I advise you to do what you can. You will find it profitable to yourself.

Bascomb."

The name of Pima Pete brought a flush to Clipperton's face.