"Going after Nat now?" asked Buster.
"Yes."
"Do you want anybody along?" asked Dave. "Better have witnesses to this."
"All right; Dave, you come along,--and you too, Phil. I guess you want to know what became of that missing gym. shoe."
"So I do," answered the shipowner's son.
"Where is Nat?" asked Roger.
"I don't know, but I'll soon find out," answered Shadow, with determination. He had been deeply chagrined over the disappearance of the shoes, boots, and slippers, and had felt it keenly when he was suspected of having walked in his sleep once again and made off with the foot coverings.
The three students left the dormitory, and from another lad learned that Nat was in the library. They sent a small boy after him, stating that he was wanted at once at the "den," a room where the students sometimes congregated, but which just then was deserted.
Wondering what was coming, the money-lender's son soon put in an appearance. He had not been told who wished to see him, and his face fell when he saw Shadow, Dave, and Phil.
"What do you want?" he asked, surlily. "I am busy this afternoon."
"Nat, is this your watch charm, the one you lost?" questioned Shadow, holding out the piece in his hand.
"Sure it is!" cried the money-lender's son. "Where did you find it?"
"Found it just where you lost it--in Luke Watson's slipper."
"Eh?" And Nat looked startled.
"Nat, we have found you out!" cried Shadow, sternly. "You needn't attempt to deny it. You took those shoes, boots, and slippers."
"Who says so?"
"I do."
"I--I did not."
"Yes, you did."
"Don't you know you were seen?" asked Phil, with a wink at his chums.
It was only a chance shot, but it told in a most unexpected way.
"Say, has Tom Hally been talking about me?" roared Nat, in sudden rage. "If he has I'll--I'll----"
"Now, take it easy," advised Dave. "Nat, don't you realize that this is a serious matter?"
"I don't care! I'll fix Hally, see if I don't!"
At that moment the door opened, and the boy who had been rescued from the hole in the snowy hollow came in with several chums.
"Hally, come here!" called Phil.
"Say, did you give me away, after all?" demanded Nat Poole, rushing forward and catching Tom Hally by the arm.
"Let go of me!" returned Hally. "I don't know what you are talking about."
"Yes, you do, you sneak!"
"I'm no sneak!" And Tom Hally's eyes flashed dangerously.
"Hally, tell me, did Nat Poole take our shoes and boots and slippers that night?" demanded Dave.
"He did." Hally grew red in the face. "I wasn't going to mention it, but now you ask me a direct question I'll not tell a falsehood. He took the shoes and hid them in the trunk room. I caught him doing it, but I thought it was only a joke, and so kept silent. Then, after you fellows rescued me from the hole in the snow, I made Nat send the shoes back. At first I was going to tell on him, but, somehow, I didn't want to play the sneak."
"I understand," answered Dave. He turned to Shadow. "This clears you."
"So it does, Shadow, and I am mighty glad of it," put in Phil.
"Yes, it clears me," answered the student who was known as a sleep-walker. "Or at least, I will be cleared--after I am done with Nat Poole," and Shadow looked at the money-lender's son in a manner that was full of grim significance.
CHAPTER XXIX
HOOKER MONTGOMERY'S REVELATION
"What do you want?" demanded Nat, and his voice trembled a little, for he realized that he was cornered.
"In the first place, I think you'll have to restore Phil's missing gym. shoe," remarked Dave dryly. "How about it, Phil?"
"That's so," answered the shipowner's son.
"I've got the shoe in my closet," growled Nat. "It dropped out when I was packing the box. I'll get it now."
"No, you don't!" cried Shadow. "You can get the shoe any time. We will settle the rest of this affair before you leave."
"I--er--I don't understand?" stammered the money-lender's son. "You've got your shoes back. What more do you want? Can't you stand for a joke?"
"Not that kind of a joke, Nat. You put me in a false light--made everybody think I had walked off with the shoes in my sleep--and you made the whole crowd buy new shoes. We ought to make you pay that bill."
"I won't pay a cent! You--you've got the new shoes."
"Well, you've got to settle with me anyway," went on Shadow, firmly. "You can take your choice of two things. If you won't explain to the whole crowd how the thing happened, and won't apologize to me, why I'm going to give you a sound thrashing, that's all."
"Humph!"
"No 'humph' about it. You can take your choice."
"I won't apologize to you, or to anybody."
"Then you'll get a sound thrashing, Nat Poole."
"I am not afraid of you!"
"You won't apologize?"
"No!"
"Very well, then. Remember, I am going to give you the thrashing of your life the very first chance I get," declared Shadow, and then, without another word he left the "den," and Dave and Phil went with him.
"Are you going to do what you just said, Shadow?" questioned Phil.
"Indeed I am! I'll teach him that he can't put off his dirty tricks on me!" declared the sleep-walker.
"When will you meet him?"
"I don't know. I'll lay for him some day when he goes to town."
"He'll keep out of your way most likely," declared Dave.
"Never mind, I'll catch him some time," declared Shadow, grimly.
A little later the missing shoe was returned to Phil. Nat Poole showed himself only during class hours, and it was plain to see that Shadow's threat had scared him. He and Bolton talked of "squaring up" with Dave, Shadow, and the others, but nothing came of the discussion.
"You are not afraid of Hamilton, are you?" asked Bolton of Nat.
"Of course I ain't!" cried the money-lender's son.
"Then why don't you challenge him to a regular fight?"
"Why, I--er--that is, it wouldn't do," stammered Nat. "Shadow would be just mean enough to let one of the teachers or the doctor hear about it, and I might be expelled. My father has been very strict lately, so I don't dare do anything to worry him. But if he attacks me I'll defend myself, don't you fear!" added Nat, boastfully. It may be added here that Nat and Shadow met the very next afternoon, back of the boathouse, and though the money-lender's son tried to get away, Shadow pounced