"It _is_ a nice flat, and I shall be sorry to leave it," agreed Lydia. "It is so extraordinarily quiet. I sleep like a top. There is no noise to disturb one, except that there was rather an unpleasant happening the other morning." "What was that?" asked Jean, stirring her tea. "I don't know really what happened," said Lydia. "I heard an awful groaning very early in the morning and I got up and looked out of the window. There were two men in the courtyard. One, I think, had hurt himself very badly. I never discovered what happened." "They must have been workmen, I should think," said Jean, "or else they were drunk. Personally, I have never liked taking furnished flats," she went on. "One always breaks things, and there's such a big bill to pay at the end. And then I always lose the keys. One usually has two or three. You should be very careful about that, my dear, they make an enormous charge for lost keys," she prattled on. "I think the house agent gave me three," said Lydia. She walked to her little secretaire, opened it and pulled out a drawer. "Yes, three," she said, "there is one here, one I carry, and Mrs. Morgan has one." "Have you seen Jack Glover lately?" Jean never pursued an enquiry too far, by so much as one syllable. "No, I haven't seen him," smiled Lydia, "You weren't a good prophet." "I expect he is busy," said the girl carelessly. "I think I could like Jack awfully--if he hadn't such a passion for ordering people about. How careless of me!" She had tipped over her teacup and its contents were running across the little tea table. She pulled out her handkerchief quickly and tried to stop the flow. "Oh, please, please don't spoil your beautiful handkerchief," said Lydia, rising hurriedly, "I will get a duster." She ran out of the room and was back almost immediately, to find Jean standing with her back to the secretaire examining the ruins of her late handkerchief with a smile. "Let me put your handkerchief in water or it will be stained," said Lydia, putting out her hand. "I would rather do it myself," laughed Jean Briggerland, and pushed the handkerchief into her bag. There were many reasons why Lydia should not handle that flimsy piece of cambric and lace, the most important of which was the key which Jean had taken from the secretaire in Lydia's absence, and had rolled inside the tea-stained handkerchief. A few days later Mr. Bertram John Glover interviewed a high official at Scotland Yard, and the interview was not a particularly satisfactory one to the lawyer. It might have been worse, had not the police commissioner been a friend of Jack's partner. The official listened patiently whilst the lawyer, with professional skill, marshalled all his facts, attaching to them the suspicions which had matured to convictions.