ve exposed him and brought about his expulsion."

"That's right," chirped Griswold. "Merriwell was as generous with
Hartwick as he could be with such a fellow. He might have used him much
worse than he did."

"And do you fancy Hartwick thinks any more of Merriwell for not exposing
him publicly?" asked Jack.

"Oh. I don't know."

"Well, I will wager that he does not. More than that, I'll venture that
Hartwick, wherever he may be, cherishes a fierce desire for revenge, and
longs for the day when he will be able to get back at Frank. Merry will
hear from that chap again."

And there the subject was dropped.

Frank enjoyed the ride upon Nemo's back, for the horse seemed
intelligent and something of a comrade. The boy talked to his mount as
if the animal could understand every word he uttered.

He had ridden beyond the limits of the city before he noticed that Nemo
was limping the least bit.

"What's the matter, old fellow?" asked Frank, with concern. "Have you
hurt yourself some way?"

Nemo shook his head. It almost seemed that the animal was answering the
question in the negative.

"You must have stepped on a stone," Merriwell declared. "Why, you are
really beginning to limp in earnest!"

Frank immediately dismounted, after having decided it was Nemo's left
hind leg or foot that was lame.

"I'll make an inspection, and see if I can discover what is the matter,"
said the boy, anxiously.

He examined both of the horse's hind feet, but could not see that
anything was wrong.

"If that rascally shoer has blundered in his work he'll not get another
chance at you, boy," Merriwell declared.

After patting Nemo's neck and fondling the fine creature a bit, Frank
mounted once more.

But Nemo limped worse than ever.

"This is singular," muttered the perplexed lad. "I don't understand it
at all. There's something wrong, for a fact."

He watched the horse, and decided that he had made no mistake in
locating the lameness in the left hind leg.

Again he dismounted and made an examination, and again the result was
far from satisfactory.

"I wish you might speak and tell me what is the matter," said Frank, in
dismay. "I'll have you examined without delay by somebody who knows his
business."

He rode slowly into the outskirts of the city.

Of a sudden there was a rattle of wheels and a clatter of hoofs behind
him.

He turned and looked back, to see a carriage coming along the road at a
reckless rate. Two pers