Lolling back in an easy chair, with his legs crossed and looking supremely at home, was the neatly dressed figure of Dr. Manning. Satan was standing on the hearthrug a few feet away. Every muscle in his great body was tense and rigid, and his whole soul seemed to be concentrated in the stare of watchful suspicion with which he was surveying the intruder.

At the sound of my footsteps both of them looked up.

"Sorry I wasn't here to welcome you," I said, coming forward across the hall. "I hope Satan has been doing the honours for me."

Manning rose lightly to his feet, and took the hand which I somewhat reluctantly offered him.

"I expect I'm a bit early," he answered, in that pleasant, imperturbable voice of his. "The fact is, I wasn't quite sure what time you said you had dinner."

"Well, it's a movable feast," I returned, "but seven-thirty is the usual hour." I took hold of his bag, which was lying on the floor beside him. "Come along up and see your quarters," I added. "Then we shall just have time for a cigarette and a cocktail. I hate rushing at food without any preparation."

"It's an uncivilised practice," he admitted, "though I'm afraid I'm often guilty of it myself. One gets into bad habits living on a barge."

I was quite prepared to believe his last statement, but thinking it wiser to keep my opinion to myself. I led the way upstairs to his bedroom, which was two doors down the passage from mine.

Having seen that he was provided with hot water and soap, I left him to his ablutions, telling him to rejoin me in the hall as soon as he was ready.

He sauntered down again about ten minutes later, by which time I had concocted a couple of alluring stimulants that even a Buenos Aires bar-tender would have been proud to father.