Get onto it, Bob?" 
"Sure I do; and I guessed all that while riding back. But tell me, why 
did he pick out my horse, instead of your Buckskin?" asked the 
Kentucky boy.
"Look back a little. Who was it gave Peg his little tumble when he was 
striking that child? Why, of course it was nobody but Bob Archer. I 
saw Peg standing on the porch of the tavern as I galloped after you; and 
give you my word, Bob, he had a grin on his face that looked as if it 
would never come off. Peg was happy--why? Because he had just seen 
you being carried like the wind out of town on a bolting nag. And I 
guess he wouldn't care very much if you got thrown, with some of your 
ribs broken in the bargain." 
Bob proceeded to tell how he had figured on what caused the queer 
antics of his horse, and then what his method for relieving the pressure 
had been. 
"Just what you should have done!" exclaimed Frank, enthusiastically. 
"Say, you're getting on to all the little wrinkles pretty fast. And it 
worked too, did it?" 
"Thanks to the smartness of Domino, it did," replied Bob, proudly. 
"Some other horses might have broken away as soon as their rider 
dismounted; but he's mighty near human, Frank, I tell you. He just 
stood there, quivering with excitement, and pain, till I got the thing off. 
But do you know what kind of thorn this is?" 
"I know it as well as you would a persimmon growing on a tree in Old 
Kentucky; or a pawpaw in the thicket. It's rank poison, too, and will 
breed trouble if the wound isn't taken care of in time. 
"That's bad news, old fellow. I'd sure hate to lose my horse," remarked 
Bob, dejectedly, as he threw an arm lovingly over the neck of the black. 
"Oh! I don't think it'll be as bad as that; especially since I happen to 
have along with me in my pack some ointment old Hank Coombs gave 
me at a time I fell down on one of the same kind of stickers, and got it 
in my arm," and Frank opened the smaller of the two packs he had 
fastened behind his saddle. 
When the ointment was being thoroughly rubbed into the spot where 
the barb of the thorn had pierced the flesh of the animal, Domino
seemed to understand what their object was. He gave several little 
whinnies, even as he moved uneasily when his master's hand touched 
the painful spot. 
"Now what's the programme?" asked Bob, after he had replaced the 
saddle. 
"Just what we decided on before," replied his chum; "a little rest before 
we make a start. Twenty-four hours will do Domino considerable good, 
too. How did you come out about the duffle you were carrying; any of 
it get lost?" 
"None that I've noticed. I'll make a round-up and see, before we go any 
further," Bob remarked, examining the packages secured behind his 
saddle. 
"How?" queried Frank, in the terse, Indian style, as he saw that the 
other had gone carefully over the entire outfit. 
"Everything here, right side up with care. And now I'll have to mount 
again, a thing that may not appeal very much to Domino. But it's lucky 
I long ago learned the jockey way of riding, with most of the weight 
upon the withers of the horse. In that manner you see, Frank, I can 
relieve the poor beast more than a little." 
Together they rode off slowly. Really, for one day it seemed that the 
big black must have had all the running his fancy could wish. Besides, 
neither of the boys knew of any reason for haste. As Frank had 
suggested, it would perhaps be just as well to allow a certain amount of 
time to elapse, before pushing their intended investigation of the 
mysteries supposed to hover around Thunder Mountain. 
The afternoon had almost half passed when Frank's sharp eyes 
discovered a single horseman riding on a course that would likely bring 
him across their trail soon. 
"Seems to me there's something familiar about that fellow's way of 
sitting in the saddle," he observed; and then, reaching for the field
glasses which he carried swung in a case over his shoulder, he quickly 
adjusted them to his eyes. "Thought so," he muttered, and Bob could 
see him smile as he said it. 
"Recognize the rider, then? Don't tell me now that it's Peg, or one of 
those slippery cowboy friends he has trailing after him," remarked Bob. 
"Here, take the glasses, and see what you think," replied the other, 
laughingly. 
No sooner had the Kentucky lad taken a single good look than he called 
out: 
"Who but old Hank Coombs, the    
    
		
	
	
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