ght Hall, but Pulter was not in.

"I'll leave the book for him," Mortimer said to Andy, "and you can call
his attention to it. If it isn't his let me know, and I'll post a notice
saying that I've found it."

"All right," agreed our hero. "But I know it's Pulter's."

He was telling Dunk about the incident, when his roommate came in a
little later, and they were discussing the queer coincidence, when
Pulter came bursting in.

"Oh, I say!" he cried. "I've got my book back! What do you know about
that? It was on my table, and----"

He stopped and looked queerly at Andy and Dunk, who were smiling.

"What's the joke?" demanded Pulter. "Did you fellows----"

"Gaffington found it," said Andy. "Sit down and I'll explain," which he
did.

"Well, that is a queer go!" exclaimed Pulter. "How in the world did my
book get out to Yale Field? It isn't so queer that Gaffington would
find it, for I understand he goes out there a lot, on walks. But how did
my book get there?"

"Probably whoever took it found they couldn't get much by pawning or
selling it, and threw it away," suggested Dunk.

"Looks that way," agreed Andy. "But it sure is a queer game all around."

They discussed it from many standpoints. Pulter was very glad to get his
book back, for he was not a wealthy lad, and the cost of a new volume
meant more to him than it would to others.

"Well, Andy, how do you size it up?" asked Dunk, when Pulter had gone
back to his apartment and Andy and his chum sat in their cozy room
before a crackling fire.

"How do you mean?" asked Andy, to gain time.

"Why, about Gaffington having that book. Didn't it look sort of fishy to
you?"

"It did in a way, yes. But his explanation was very natural. It all
_might_ have happened that way."

"Oh, yes, of course. But do _you_ believe it?"

"I don't know why I shouldn't. Gaffington's folks have no end of money,
you know. He wouldn't be guilty of taking a book. If he did want to crib
something he'd go in for something big."

"Well, some of these quadrangle robberies have been big enough. There's
my watch, for instance."

"What! You don't mean you believe Gaffington is the quadrangle thief!"
exclaimed Andy, in surprise.

"I don't believe it, exactly, no. If he's rich, as you say, certainly he
wouldn't run the risk for the comparatively few dollars he could get out
of the thefts. But I will admit that this book business did make me
suspicious."

"Oh, forget it," advised Andy, w