"Anything else?" she asked after a pause.
The Seraph wrinkled his brows in thought.
"Gladys Merivale was coughing last night," he said. "Some one passed my door at two o'clock and went into her room. I don't know who it was, but it wasn't you. The coughing stopped for a time, but started again just before three. Then you passed by and went in."
"How do you know?"
"I heard you."
"You may have heard some one; you didn't know it was me. I went once and mother went once. You couldn't tell which was which."
The Seraph lit a cigarette and walked with her to the door of the supper-room.
"Oh, it was your mother?" he said. "Then she went the first time."
"But how do you know?" Sylvia repeated.
"I can't explain, any more than about the car coming back this morning."