The car drew up outside Quest’s house. The Inspector assisted his companion to alight and rang the bell at the front door. There was a somewhat prolonged pause. He rang again.

“Never knew this to happen before,” he remarked. “That sort of secretary-valet of Mr. Quest’s—Ross Brown, I think he calls him—is always on the spot.”

They waited for some time. There was still no answer to their summons. The Inspector placed his ear to the keyhole. There was not a sound to be heard. He drew back, a little puzzled. At that moment his attention was caught by the fluttering of a little piece of white material caught in the door. He pulled it out. It was a fragment of white embroidery, and on it were several small stains. The Inspector looked at them and looked at his fingers. His face grew suddenly grave.

“Seems to me,” he muttered, “that there’s been some trouble here. I shall have to take a liberty. If you’ll excuse me, Mrs. Rheinholdt, I think it would be better if you waited in the car until I send out for you.”

“You don’t think the jewels have been stolen again?” she gasped.

The Inspector made no reply. He had drawn from his pocket a little pass-key and was fitting it into the lock. The door swung open. Once more they were both conscious of that peculiar silence, which seemed to have in it some unnamable quality. He moved to the foot of the stairs and shouted.

“Hello! Any one there?”

There was no reply. He opened the doors of the two rooms on the right hand side, where Quest, when he was engaged in any widespread affair, kept a stenographer and a telegraph operator. Both rooms were empty. Then he turned towards Quest’s study on the left hand side. French was a man of iron nerve. He had served his time in the roughest quarters of New York. He had found himself face to face with every sort of crime, yet as he opened that door, he seemed to feel some premonition of what was to come. He stepped across the threshold. No power on earth could have kept back the cry which broke from his lips.

The curtains of the window which looked out on to the street, were drawn, and the light was none too good. It was sufficient for him, however, to see without difficulty the details of a ghastly tragedy. A few feet away from the door was stretched the body of the secretary-valet. On the other side of the room, lying as though she had slipped from the sofa, her head fallen on one side in hideous fashion, was the body of Miss Quigg, the Salvation Army young woman. French set his teeth and drew back the curtains. In the clearer light, the disorder of the room was fully revealed. There had been a terrible struggle. Between whom? How?

There was suddenly a piercing shriek. The Inspector turned quickly around. Mrs. Rheinholdt, who had disregarded his advice, was standing on the threshold.