I leaned forward. “Have you talked to Sir Walter?” I asked.

“I have talked to him, and he has given me to understand that there’s a deal ahead which you’re going to boss. There are no flies on that big man, and if he says it’s good business then you can count me in.”

“You know that it’s uncommonly dangerous?”

“I judged so. But it don’t do to begin counting risks. I believe in an all-wise and beneficent Providence, but you have got to trust Him and give Him a chance. What’s life anyhow? For me, it’s living on a strict diet and having frequent pains in my stomach. It isn’t such an almighty lot to give up, provided you get a good price in the deal. Besides, how big is the risk? About one o’clock in the morning, when you can’t sleep, it will be the size of Mount Everest, but if you run out to meet it, it will be a hillock you can jump over. The grizzly looks very fierce when you’re taking your ticket for the Rockies and wondering if you’ll come back, but he’s just an ordinary bear when you’ve got the sight of your rifle on him. I won’t think about risks till I’m up to my neck in them and don’t see the road out.”

I scribbled my address on a piece of paper and handed it to the stout philosopher. “Come to dinner tonight at eight,” I said.

“I thank you, Major. A little fish, please, plain-boiled, and some hot milk. You will forgive me if I borrow your couch after the meal and spend the evening on my back. That is the advice of my noo doctor.”

I got a taxi and drove to my club. On the way I opened the envelope Sir Walter had given me. It contained a number of jottings, the dossier of Mr Blenkiron. He had done wonders for the Allies in the States. He had nosed out the Dumba plot, and had been instrumental in getting the portfolio of Dr Albert. Von Papen’s spies had tried to murder him, after he had defeated an attempt to blow up one of the big gun factories. Sir Walter had written at the end: “The best man we ever had. Better than Scudder. He would go through hell with a box of bismuth tablets and a pack of Patience cards.”

I went into the little back smoking-room, borrowed an atlas from the library, poked up the fire, and sat down to think. Mr Blenkiron had given me the fillip I needed. My mind was beginning to work now, and was running wide over the whole business. Not that I hoped to find anything by my cogitations. It wasn’t thinking in an arm-chair that would solve the mystery. But I was getting a sort of grip on a plan of operations. And to my relief I had stopped thinking about the risks. Blenkiron had shamed me out of that. If a sedentary dyspeptic could show that kind of nerve, I wasn’t going to be behind him.

I went back to my flat about five o’clock. My man Paddock had gone to the wars long ago, so I had shifted to one of the new blocks in Park Lane where they provide food and service. I kept the place on to have a home to go to when I got leave. It’s a miserable business holidaying in an hotel.

Sandy was devouring tea-cakes with the serious resolution of a convalescent.