e some things they did not know.

"Doctor," said Frank, promptly, "I wish to beg your pardon. I believe I
said something rather hastily, but now I wish to say that you know your
business thoroughly."

The doctor smiled, and closed his case.

"I have been in the business all my life," he said, "but I expect to
continue to learn something new about it as long as I live. I will say
that I doubt if I should have seen what was the matter with your horse
if you had not told me of the fellow you believed had lamed him and how
the horse kicked up a racket when the man was in the stall. That set me
to looking for tricks, and I found the hair."

Frank offered to pay the doctor, but he refused to take it then, saying:

"Here's my card, young man. If your horse is all right this afternoon
you may send me five dollars. You may need me again some time."

Then he strode out of the stable, flung the case under the seat,
scrambled into his carriage, caught up the reins, and away he went in a
hurry.

"Well, may I be farred and tethered--I mean tarred and feathered!" cried
Harry Rattleton. "I never saw anything like that before."

"Nor I," confessed Jack Diamond. "It's astonishing! I have learned
something to-day that I never knew before. I never would have dreamed
that a hair could lame a horse in that way!"

"You want to look out for Nemo now," said Harry, "and not let that chap
get at him again."

"I mean to," asserted Frank. "I have sent for my colored boy, Toots, to
come on and keep watch here when Grody is unable to do so. Till he gets
here, Grody, I want you to watch Nemo like a hawk. I hardly think the
whelp will try another trick, but there is no telling. I gave him a bad
thumping."

"But not half what he deserved!" cried Diamond.

CHAPTER VI.

PRINCE AND THE EAVESDROPPER.

Nemo's lameness seemed to vanish as if by magic, and Frank was well
satisfied. Grody took the utmost care of Nemo till Toots arrived.

The colored boy was delighted to come on to New Haven, and, as he was a
lover of horses, his new occupation suited him very well. When Frank
could not find time to take the horse out for his daily exercise Toots
did it.

One evening a party of students gathered in Diamond's room. He had
invited them there to show them his new bulldog.

Diamond had a fad, and it was dogs. His dog had caused trouble between
Diamond and Merriwell early in their college career by taking a strip
out of Frank's trousers.