“No, I see. And whose tray did you take in first?”

Mary blushed, and stood on one leg. “Well, Mr Guy's, sir. He does like his tea so hot!”

“Were you long in his room?”

“Oh no, sir!” said Mary, shocked. “I only put the tray down by the bed, and drew the curtains back, and things like that.”

“Things like what?”

“Well, straightening the room, sir, and putting his shaving-water on the washstand, and waking him up.”

“So you might have been there about five minutes or so?”

“Yes, I expect it would be about that,” Mary agreed. “When you came out again was anyone on the landing?”

“Oh no!” Mary said. “Whatever would anyone be out there for at that hour?”

“I just wanted to know. Whose was the next tray you took in?”