"And now, my friends, having cleared up one part of the mystery, there is still a question of the jewels' hiding place.... What's that, Sir Edgar? How did I find out where Lady Margaret was hidden and by whom? Well, Blake gave himself away finally last week by his efforts to throw suspicion on the owner of that gold lace scarf. It seemed clear to me that had he Lady Margaret in his power, the evidence of her scarf would be a dangerous weapon against her, and one that would enable him to retain a hold over her. Then, again, I had recognized from the beginning that he was not an Asiatic; his eyes, dark though they were, had no yellow tinge, nor were they set Eastern fashion. His accent, in moments of excitement, left much to be desired. As to his brother and the Pentacle Club: they had evidently meant to make this house their headquarters, and they took advantage of its construction in order to make what would have been a safe deposit bank for their loot. "Poking about here, I discovered that the cellars, below this, were in reality kitchens and there is no doubt that originally this room was a huge dining room, to which food was brought up from below. What's that, Lady Brenton; impossible without a lift? Wait just one moment. Look down on this parquet floor. Do you see over here, for instance, a little piece of the wood, darker than the rest?" Every eye turned in Cleek's direction searching the big floor carefully. "Yes, and here's another," cried Jennifer Wynne, suddenly. "And another!" put in Dr. Verrall with some excitement. A minute or so later and three more were discovered joining what at first sight seemed to be a disconnected circle. But Cleek took out a piece of chalk from his pocket. "I need hardly tell you that a pentacle is a six-sided star very frequently used in masonry and the East," he said as they looked at him in some mystification. "I knew that the murdered man was a member of the notorious Pentacle Club, since a pentacle was tattooed on his arm--Dr. Verrall will bear me out in that--and the pentacle was therefore in my mind's eye when I did this." Kneeling, he swiftly joined up the points, and beneath the eyes of the interested watchers the white chalk marks, standing out clearly on the dark floor, grew into the ancient sign of a huge pentacle which spread across the centre of the room. "Now," said Cleek, after they had surveyed his handiwork in amazement, "let us find the centre. And now look at this----" Standing in the centre of the pentacle he stooped down and pressed hard on one of the little pieces of dark parquet. As he did so a cry of astonishment broke from all those present, for a section of the floor, about the size of the space covered by a large tray, very gently sank in front of them, and they saw Cleek carried noiselessly and gently down into the darkness beneath. Another minute and he was up again, a little smile on his face.