“Yes.”

“Where did you go on your return?”

“To my sitting room. He lighted my lamp and then excused himself, because of some work he had to do.”

“When did you see him again?”

“At half-past nine, when I went to bid him good-night.”

“Are you certain of the time?”

“Yes; for I stopped to wind the clock as I went through the hall, and noticed that it was exactly half-past nine.”

“There are two doors to the library, are there not—one from the main hall and one from the side?”

“Yes.”

“By which one did you enter the library?”