"When I discovered this," he went on, "it gave me plenty of food for thought and my further explorations still further solved the mystery. Mr. Narkom, if you will add your torch's gleam to mine it will give us light enough to complete my task. Come, you need not fear the lift will give way, it has carried down bigger and stranger burdens, I promise you." A little hesitating murmur came from the ladies, but their curiosity overcame their fears, and two by two they descended down to the bottom of what looked like a well, lit as it was by the circle of light given out by Mr. Narkom's torch. Once down, however, they discovered that they were in an underground vault, which had certainly been used as a kitchen, for the old-fashioned stoves still stood against one side. "You see," said Cleek, in quiet, reassuring tones, "having once discovered this arrangement it is no wonder that Blake conceived this method of getting hold of the Cheyne jewels. With only poor eccentric Miss Cheyne to dispose of, the task was an easy one. It only remained to get them into his possession through the agency of Lady Margaret, and if she had not discovered the trick that was being played on her, all would have gone off smoothly. As it was, however, Blake probably did not know whether she had contrived to warn someone or not!" Lady Margaret herself intervened here in a quick, agitated voice. "That's just it," she said. "I told him Sir Edgar knew and Lieutenant Deland and Miss Lorne as well and I said that you would all come after me and get the jewels back, too, which seemed to make him furious." "That accounts for his plan to hide them securely, then," said Cleek, squaring his shoulders. "I see. But surely he conceived the strangest method of concealment that ever entered man's mind." As if in illustration of his words, there suddenly burst forth the horrible sound, like the wailing of a dog in his death agonies, which had swept over the ballroom upon that first day of the inquest. Jennifer and Lady Brenton both shrieked aloud and Cleek had as much as he could manage to silence them. "It is all right, don't be afraid," he said, serenely. "For that is the jewel-case of the Pentacle Club." "_Jewel-case!_" cried Dr. Verrall, excitedly, at this strange remark. "What are you talking about? That was a living animal's cry, I'll take my oath." "Quite right, Doctor; look for yourself." With a swift step toward a door back of him, Cleek threw it open and disclosed another room into which he beckoned them. Here the morning light streamed in through windows and gratings let into the walls, and it was evident that they gave upon the old moat outside. But this they hardly noticed, for an amazing sight met their eyes. Round the walls were ranged cages big and small, every one with a living occupant. Cage after cage contained small kangaroos, oppossums, civet-cats, in fact, every variety of marsupial animal.