It will be remembered that to attend to the jeweled chalice case, which proved to be an affair of a day and a night only, I had been taken off a job concerning a series of hotel robberies, and I was particularly glad to be put back upon this case, because Quarles was so intensely interested in it. Although the chalice case was not actually cleared up satisfactorily for some months, it was practically certain that the attack made upon us had nothing to do with the theft of the chalice. The professor was convinced that, unconsciously, we had been hot upon the trail of the hotel robberies, that the trails of the two cases had, in fact, crossed each other. It seemed to me that he had jumped to this conclusion upon insufficient evidence, but I determined to make a thorough investigation of the house at Hampstead at once. The house was in charge of a caretaker named Mason, who lived there in one sparsely furnished room, but on the night of our capture he had absented himself without leave. This looked suspicious, but the man was able to prove that he had told the truth as to his whereabouts, and further inquiry elicited nothing against him. Quarles also declared emphatically that Mason was not the masked man he had seen in the cellar. I next managed to get an interview with the owner of the house, a Mr. Wibley. He had lived in it himself for a time, but it had now been empty for about two years. It was a good house, but old-fashioned. People did not like basements, and as the house was in a neighborhood which was deteriorating he had not felt inclined to spend money upon it. He knew nothing about the caretaker who had been put there by the house agent, but he was very keen to give me any help in his power, for he had himself been a victim of one of the hotel robberies. Business occasionally brought him to town from his house in Hampshire, and while staying in an hotel a big haul had been made, and a necklace which he had bought for his daughter only that day was amongst the property stolen. All these robberies, which had occurred over a period of six months, had been carried out with a success which entirely baffled the authorities. Apparently rooms were rifled during the table d'hote; at least, it was always late in the evening that the robberies were discovered. In no case had a guest or a servant left suddenly or suspiciously, and drastic search had discovered nothing. There could be little doubt that a clever gang was at work, but during this period not a single stolen article had been traced. Scotland Yard had any number of men engaged upon the case; known thieves were watched, and fences kept under observation; but as a fact there had been no clue at all until Quarles and I had been kidnaped.