"That'll be splendid, Hugh, if I can only do it; but how can I teach him? I remember reading a book once about a man who lived in Mexico, and he had trained his horse just that way; and I remember that whenever he had left his horse and was on foot, and his enemies got after him, he'd whistle, and the horse would come dashing up, and he'd jump into the saddle and ride away. You see, his was the fastest horse in all that country, and they never could catch him." "Well, now," said Hugh, "there's no reason why you shouldn't teach yours to do just that same thing, and yours is just about the fastest one in all this country; so you might be just like the fellow you read about in the book. Now, after a while, when the horse is feeding quite a little way from you, you whistle to him, and then pull on his rope and make him come up to you and give him a lump of sugar. Don't give him only one, and then let him wander off and pick grass again, and the next time he gets pretty well toward the end of his rope, whistle to him again, and draw in on the rope and bring him up close to you and give him another lump of sugar. Do that half a dozen times, not too close together, and the first thing you know you'll see him start toward you just as soon as you whistle. Mind you always whistle to him the same way. Are you a pretty good whistler? Can you whistle loud?" "No, I can't whistle very loud," said Jack. "I can whistle a little, but I can't whistle real shrill." "Well, hold on now; what will we do for a whistle? Seems to me your uncle's got a dog whistle somewhere in the house, that he always used with old Dan, that bird dog that he hunted with. I think I saw that whistle this winter in the cigar box on top of the book shelves. Hold on a minute." Hugh went into the house and a few minutes later came out again with the dog whistle and gave it to Jack. "Now," he said, "if you're going to teach the horse to mind that whistle, you'll have to get your uncle to give it to you, and carry it with you all the time. If he gets to learn one sound he'll mind that and no other. Try him now, before I start off." Pawnee was busy eating grass, nearly at the full length of the rope, when Jack gave a long shrill blast on his whistle, and, at the unusual sound, the horse raised his head and looked about. Jack began to gather in the rope, and Pawnee, following it, walked up to him and stuck out his nose. Jack offered him a piece of the sugar, at which he at first sniffed rather suspiciously, and then ate and seemed to enjoy. He reached out his nose for more, but Jack threw down the rope and turned away, and presently the horse walked back and began to eat the grass again. "That's all right," said Hugh, "you'll see that before night he'll come quick when you blow that whistle. Well, so long; I must be going;" and Hugh walked away to the corral to get his horse.