wandered through the service door, and there made the important discovery that the kitchen was on the top floor, and also that meals were being served somewhere in the basement. This he saw during the few minutes he was allowed to make observations, because there was a service lift which was sent down to the unseen clients below.
He apologized for his intrusion and went out. Officially there was no basement-room, nor, from the restaurant itself, any sign of stairs which led down to an underground chamber. He made a further reconnaissance, and found the back door which Sophia Kensky had described in her hypnotic sleep, and the location of which the old man had endeavoured to convey to his agent.
Malcolm Hay was gifted with many of the qualities which make up the equipment of a good detective. In addition, he had the education and training of an engineer. That the underground room existed, he knew by certain structural evidence, and waited about in the street until he saw three men come out and the door close behind them. After awhile, another two emerged. There was nothing sinister or romantic about the existence of a basement dining-room, or even of a basement club-room.
The character of this club was probably well
