"I agree with you, Mr. Sheriff!" declared the old hermit of the cave. "Because if he were set free I fear he would chase after the United States mail, if a single hope remained of stealing my property. Yes, kindly keep him by you until I come around with news." Then he turned to the two cow punchers, who had stood moodily by, listening to all that was being said. "I have no use for either of you men," he remarked, shaking a finger at them; "so the sooner you get down out of this place, the better. And while I continue to remain here a few days, I'm going to ask these brave lads to keep me company as a guard of honor. I've many things to show that may interest them. And I want to accompany Frank to his home a little later, if possible." And so it was arranged. Old Hank and Chesty declared that their orders had been to stay as long as Frank and Bob did; so they also took up their quarters in the apartments that went to make up what the little old gentleman had called Echo Cave. The two sheriffs took their prisoner away, to place him in some secure nook while they continued their search for the pair of scoundrels whom they had hunted so long, and were determined to get this time. As they will not be seen again in this story it may only be right to say that Frank afterwards read an account in a paper of how the sheriffs finally rounded up the Arizona Kid and Big Bill Guffey, arresting them after a warm resistance in which all of the participants were wounded. And in due time doubtless the bad men who had so long defied the law, paid the penalty for their various crimes. The saddle boys certainly did enjoy the few days they spent with the queer little hermit, while he completed his odd business in the rock dwellings of the ancient cliff men. They found the echo which had caused him to give the place its name, and spent many an hour amusing themselves with its astonishing power to send back sounds. Finally Havasupai made his appearance, bearing with him a receipt, which proved that the precious packet had been sent by registered mail to Circle Ranch. And then the professor announced himself as ready to take his departure from the scene of his two years' labors as a hermit, working in the interests of science. "It's a wonderful old place," Bob declared as they took their last look at the Grand Canyon from the bluff in front of the hotel, ere mounting their horses and starting back home across the many miles that lay to the south and east before Circle Ranch might be reached. "Yes, and we'll never forget what we've seen here," added Frank. "Not to speak of the adventures that have come our way," remarked Bob. "Tell you the truth, Frank, I'll be mighty sorry when our trip is over, because I reckon it'll be a long time before we have another chance for such a great gallop."