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100 famous Madame Nadina. She's a celebrated Russian dancer, you know. She's never appeared in London, but Paris has been quite mad about her. She had a terrific success there all through the War. A thoroughly bad lot, I believe, but most attractive. The purser expressed his regrets that she wasn't on board in a most heart-felt fashion when he gave me her cabin, and then Colonel Race told me a lot about her. It seems there were very queer stories afloat in Paris. She was suspected of espionage, but they couldn't prove anything. I rather fancy Colonel Race was over there simply on that account. He's told me some very interesting things. There was a regular organized gang, not German in origin at all. In fact the head of it, a man always referred to as 'the Colonel' was thought to be an Englishman, but they never got any clue as to his identity. But there is no doubt that he controlled a considerable organization of international crooks. Robberies, espionages, assaults, he undertook them all—and usually provided an innocent scapegoat to pay the penalty. Diabolically clever, he must have been! This woman was supposed to be one of his agents, but they couldn't get hold of anything to go upon. Yes, Anne, we're on the right tack. Nadina is just the woman to be mixed up in this business. The appointment on the morning of the 22nd was with her in this cabin. But where is she? Why didn't she sail?"

A light flashed upon me.

"She meant to sail," I said slowly.

"Then why didn't she?"

"Because she was dead. Suzanne, Nadina was the woman murdered at Marlow!"

My mind went back to the bare room in the empty house, and there swept over me again that indefinable sensation of menace and evil. With it came the memory of the falling pencil and the discovery of the roll of