“Indeed, I will,” cried Chester, holding out his hand to take his host’s, which was extended unwillingly, and felt like ice. “Oh yes, I will come to-morrow or the next day. This is no paltry excuse. You may trust me.”

“Ah, well, I will,” said the old man, who seemed to be satisfied with his scrutiny. “Pray come, then, and put up with my strange, unworldly ways; and you must give me some more hints about my health. In the meantime I will look out some of the old medical and surgical works. You will find them interesting.”

“Yes, I hope we shall spend many hours together,” said Chester, frankly, as he moved toward the door, the old man walking by his side with his hands under the tails of his coat, where a looker-on would have seen that they were crooked and opening and shutting spasmodically.

It was very dim now in the book-burdened room, the evening light having hard work to pierce the uncleaned panes of the windows; but there was light enough to show that, and also that the old bookworm’s claw-like right hand went into the coat-pocket and half drew from it something small and hard.

But nothing followed as they walked into the gloomy hall and away to the front door, where, after a friendly shake of the hand, Chester uttered a sigh of relief as he turned away from the house, seeming to breathe more freely as he walked briskly along.

“Pah! the old place felt like a sepulchre,” he muttered. “It was just as if the hand of death were clutching at me. I believe that if I had not taken that brandy I should have fainted. What a state my nerves must be in. Why, it is the most fortunate thing that could have happened. Once gain the old man’s confidence, I can stay there and watch the next house as long as I like.”

There was something ominous about the old bookworm’s act as he went softly back into his half-dark, dusty room, evidently thinking deeply, till he stopped short in the middle to stand gazing down at the floor.

“Yes, he said he was ill; he looked ill when he came up to the door—half mad. He will come back again, perhaps to-morrow—perhaps to-morrow. Hah! it was very near.”

He raised his head now, went to the drawer from which he had taken the key, and placed back in it the heavy life-preserver, and then taking from the tail of the coat one of the short, old-fashioned pocket pistols which were loaded by unscrewing the little barrel by means of a key. This he examined, taking off the cap, after raising the hammer and putting a fresh one in its place. After this he closed the drawer and sat down to think.

“Yes,” he said, half aloud, “it was very near. The next time he comes perhaps he’ll stay. He is getting to be a nuisance, and a dangerous one, as well.”