"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 expected, he was watching us all the time we examined that wonderful paper, and of course he believed it to be something for which his employer would reward him heavily, if he could only lay hands on it."

Bob himself was laughing now, as the full sense of the ridiculous character of Frank's little joke broke upon him.

"Oh! my, think what will happen when Mr. Warringford tears open that envelope, and sees how his spy has been fooled!" he exclaimed.

"There's only one bad thing about it, Bob!"

"What is that?" inquired the other.

"Eugene is, I take it, a clever fellow," said Frank, seriously; "and he'll understand that this was done with a purpose. It will make him suspect that we're onto the game, and that we know he has the half-breed watching our every move."

"Well, what of that, Frank?"

"Nothing, only after this we may expect they'll change their tactics more or less, and play on another string of the fiddle," the other saddle boy replied.