“Here they are,” said Michael; “help me to sit up.” She raised him to a sitting position as the door opened and a dim figure appeared silhouetted against the dusk. It struck a match and lit a candle and Dr. Garon was revealed. He placed the candle carefully upon the floor just behind the half-closed door and passed slowly over to where Michael lay. “Well, my young sleuth,” he said pleasantly, “the best of friends must part.” “Fortunately,” said Michael, “I do not fall into the category of your friends.” The doctor hummed a little tune as he took a small leather case from his pocket. “You have seen a hypodermic syringe before, I suppose?” he held up the tiny instrument. “I am going to give you a slight dope, which won’t hurt you.” “One moment,” said Michael, “do I understand that this dope is--final?” The doctor bowed. From his heightened colour and his unsteady hand Michael guessed he had been drinking, either to give himself nerve for his task or to drown the memory of his misfortune. “Very good,” said Michael. He looked up at the girl and raised his face and Kate stooped and kissed him on the lips. “That is it, is it?” said the doctor unpleasantly. “Gregori will be pleased.” He caught the manacled wrists of the prisoner and pulled back his sleeve and the girl’s heart almost ceased to beat. It was at that moment that the light went out. “Who is there?” said the doctor releasing his grip on Michael’s arm and turning quickly. He took a groping step forward through the darkness. “Who’s there?” he said again and they heard a soft thud followed by the sound that a body might make, when it struck the ground. Michael caught his breath. Suddenly a beam of light danced in the room and focused upon the prostrate figure of Dr. Garon. “Got him,” said a well-satisfied voice. “Barr,” whispered Michael, “where did you spring from?” “I came through the door,” said the voice. “Did you see it open? That is what knocked the candle over.” He flashed the light on his superior. “They have got the bracelets on you, sir,” he chuckled softly, took a key from his pocket and with a few deft turns released the other. His pocket knife finished the work. Michael stretched his cramped limbs. “I tried to get in last night but they had too many sentries--I couldn’t come here or get back to a telephone. I have been lying on that hillside all last night and all to-day,” said Detective-Sergeant Barr. “I dared not move until it was dark. I tell you, sir, I had a bit of a fright. I thought they would get away.” “Have you a revolver?” asked his chief. The man slipped a weapon into his hand. They made their way softly back through the room where the engine was still smoking, through the little steel door of the office. It was empty save for a shrouded figure which lay beneath the table. There was a second door in the room. Michael tried this. It was locked. He heard voices and tapped at the door. “Who is there?” said Gregori.