invest in some worthless mines over in the Hualpai
Mountains of Mohave County. I kept it, meaning to figure out how these
sharpers work their game. Now, when I hand you this, look deeply
interested, as though it might be connected with the finding of Uncle
Felix."

"Oh! I see your move, and go you one better, Frank."

For some little time they seemed to be conversing intently. Frank would
occasionally tap the document, which he had sealed up in its envelope,
as though he laid great stress on it. Finally he placed it on the table
alongside his plate, and kept on talking.

Shortly afterward the boys left the table in apparently such a hurry
that they both forgot the envelope that lay there, half hidden by a
napkin.

Passing out of the room, they dodged back, and peered around the corner
of the doorway.

"There's the waiter at the table," said Bob. "Now he's found the fine
tip you left there, and is putting it in his pocket, with a grin. If
everybody treated him as well as that, he'd soon be owning one of these
hotels himself, Frank."

"Watch!" remarked his chum, in a low whisper. "Now he's discovered the
document lying there where I left it. He takes it up. Perhaps he sees
another dollar coming to him when he runs after us to return it."

"But there's somebody at his elbow," Bob went on to say; "and it's
Abajo, as sure as you live. He's saying something, and I reckon telling
the waiter that you asked him to get the packet. There, he slips some
money in the fellow's hand; and the waiter lets him take the envelope.
And we'd better slip behind this coat rack here, for Abajo will be
heading this way in a hurry."

And hardly had they carried out that programme ere the half-breed glided
past, one hand held in the pocket where he had thrust the "valuable"
document!

CHAPTER XIII

GOING DOWN THE CANYON TRAIL

"Was I right?" asked Frank, after the half-breed had disappeared.

"I should say yes," replied his chum, who had followed the vanishing
figure of Abajo with staring eyes.

"He got the precious paper, all right, eh?" Frank went on, chuckling.

"He sure did, and bribed our friend the waiter to let him carry it off.
Shows how you can trust anybody in the tourist country, where they are
nearly all out for the money," Bob declared, indignation struggling hard
with a sense of humor.

"But just stop and think how easy Abajo, sharp rascal that he is, rose
to my little bait?" laughed Frank. "Just as I exp