O LIVER and his guardian retired about ten o\'clock. Mr. Bundy was not long in going to sleep. Unlike Oliver, he had no care or anxiety on his mind. As we have said, he was not a man to harbor suspicion.

With our hero it was different. He knew the real character of Denton, and could not help fancying that he must have some personal object in bringing them to this house, and installing them in a room adjoining his own.

Oliver carefully locked the door, leaving the key in the lock. There was but one door, and this led into the hall.

"Now," thought our hero, "Denton can\'t get in except through the keyhole."

This ought to have quieted him for the night, but it did not. An indefinable suspicion, which he could not explain, made him uneasy. It was this, probably, that prompted him to go to the closet in which he knew that Nicholas Bundy kept a pistol. At times he placed the pistol under his pillow, but he had not done so to-night, considering it quite unnecessary in a quiet boarding-house.

"I don\'t suppose there\'s any need of it," thought Oliver; "but I\'ll take it and put it under my own pillow."

Nicholas Bundy was already asleep. He was a sound sleeper and did not observe what Oliver was doing, otherwise he would have asked an explanation.

This might have been hard to give, except the chance knowledge he had gained of Denton\'s character.

An hour passed and still Oliver remained awake. At about this time he heard a noise in the adjoining room as of someone moving about.

"It is Denton come home," he said to himself.

Presently the noise ceased, and Oliver concluded that his disreputable neighbor had gone to bed.

He began to be rather ashamed of his suspicions.

"Of course he can\'t get in here, since there is but one door, and that locked," he reflected. "It is foolish for me to lie awake all night. I may as well imitate Mr. Bundy\'s example and go to sleep."

Oliver was himself fatigued, having been about the streets all day, and now that his anxiety was relieved he, too, soon fell into a slumber. But his sleep was neither deep nor refreshing; it was troubled by dreams, or rather by one dream, in which Denton figured.

It was this, perhaps, that broke the bonds of sleep. At any rate, he found himself almost in an instant broad awake, with his eyes resting on a figure, clearly seen in the moonlight, standing beside Nicholas Bundy\'s bed examining the pockets of his coat and pantaloons, which rested on a chair close beside.

Immediately all his senses were on the alert. In one swift glance he saw all. The figure was that of Denton, and an opening in the panel between the two rooms showed how he had got in. It was clear that this was a decoy house, especially intended to admit of such nefarious deeds.

Denton\'s back was turned to Oliver, and he was quite unaware, therefore, that the boy had awakened. Bundy lay before him in profound sleep, and from a careless glance he had concluded that the boy also was asleep.

"Now," thought Oliver, "what shall I do? Shall I shoot at once?"

This course was repugnant to him. He had a horror of shedding blood unless it were absolutely necessary, but at the same time he was bold and resolute, and by no means willing to lie quietly and see his guardian robbed.

It was certainly a critical moment, and required some courage to face and defy a midnight robber, who might himself be armed. But Oliver was plucky, and didn\'t shrink.

In a clear, distinct voice he asked:

"What are you doing there?"

Denton wheeled round and saw Oliver sitting up in bed. He had a black mask over his eyes, and thought he was not recognized.

"Confusion!" Oliver heard him mutter, under his breath. "Cover up your head, boy, and don\'t interfere with me, or I\'ll murder you!" he said in a low, stern voice.

"I want to know what you are doing?" demanded our hero, undaunted.

"None of your business. Do as I tell you!" answered Denton, in a menacing tone.

"It is my business," said Oliver firmly. "You have no business here, Mr. Denton. Go back into your ............