Apparently the stage-whisper in which this challenge to a possible burglar was uttered rendered it unavailing, for there was no reply; but that there was some one below who could reply Thaddeus was now convinced, for there were sounds in the library—sounds, however, suggestive of undue attention to domestic duties rather than of that which fate has mapped out for house-breakers. The library floor was apparently being swept.

“That’s the biggest idiot of a burglar I’ve ever heard of,” said Thaddeus, returning to his room.

“Wh-wha-what, d-dud-dear?” mumbled Mrs. Perkins, burying her ear in the pillow for comfort now that she was compelled to take her nose away so that she might talk intelligibly.

“I say that burglar must be an idiot,” repeated Thaddeus. “What do you suppose he is doing now?”

“Wh-wha-what, d-dud-dear?” asked Bessie, apparently unable to think of any formula other than this in speaking, since this was the second time she had used it.

“He is sweeping the library.”

“Then you must not go down,” cried Bessie, sitting up, and losing her fear for a moment in her anxiety for her husband’s safety. “A burglar you might manage, but a maniac—”

“I must go, Bess,” said Thaddeus, firmly.

“Then I’m going with you,” said Mrs. Perkins, with equal firmness.

“Now, Bess, don’t be foolish,” returned Thaddeus, his face assuming a graver expression than his wife had ever seen there. “This is my work, and it is none of yours. I positively forbid you to stir out of this room. I shall be very careful, and you need have no concern for me. I shall go down the backstairs and around by the porch, and peep in through the library window first. The moonlight will be sufficient to enable me to see all that is necessary.”