What was strange in the whole case, and struck Detective Hankin immediately, was the fact that the burglar, whoever he was, must have known a great deal about the house and its ways. He also must have had a definite purpose in his mind not usually to be found in the brain of a common housebreaker. He must have meant to steal the miniatures and nothing else, since he made his way straight to the library, and, having secured the booty, at once made good his escape without trying to get any other article which could more easily be disposed of than works of art. You may imagine, therefore, how delicate a task now confronted Inspector Hankin. You see, he had questioned everyone in the house, including Mr. Frewin’s valet and nurses, and from them he casually heard of Mrs. Frewin’s parting words to her dying husband and of her mention of the scapegrace son, who was evidently in the immediate neighbourhood, and whom she wished to come and see his father. Mrs. Frewin, closely questioned by the detective, admitted that her son was staying in Brighton, and that she saw him that very evening. “Mr. Lionel Frewin is staying at the Metropole Hotel,” she said coldly, “and he was dining with my sister, Lady Steyne, last night. He was in the house at Sussex Square when I arrived in my motor,” she added hastily, guessing, perhaps, the unavowed suspicion which had arisen in Hankin’s mind, “and he was still there when I left. I drove home very fast, naturally, as my husband’s condition was known to me to be quite hopeless, and that he was not expected to live more than perhaps a few hours. We covered the seven miles between this house and that of my sister in less than a quarter of an hour.” This statement of Mrs. Frewin’s was, if you remember, fully confirmed both by her sister and her brother-in-law, Lady Steyne and Sir Michael. There was no doubt that young Lionel Frewin was staying at the Hotel Metropole in Brighton, that he was that evening dining with the Steynes at Sussex Square when his mother arrived in her motor. Mrs. Frewin stayed about an hour, during which time she, presumably, tried to influence her son to go back to Blatchley with her in order to see his dying father. Of course, what exactly happened at that family interview none of the four people present was inclined to reveal. Against that both Sir Michael and Lady Steyne were prepared to swear that Mr. Lionel Frewin was in the house when his mother arrived, and that he did not leave them until long after she had driven away. There lay the hitch, you see, for already the public jumped to conclusions, and, terribly prejudiced as it is in a case of this sort, it had made up its mind that Mr. Lionel Frewin, once more pressed for money, had stolen his father’s precious miniatures in order to sell them in America for a high sum. Everyone’s sympathy was dead against the young son who refused to be reconciled to his father, although the latter was dying.