I heard him give a sort of howl.

“Bobbie,” I said. My feet were freezing, but I was fond of him.

“Well?”

“I’ve remembered something too. It’s this. The day you went to the Coliseum I lunched with you both at the Ritz. You had forgotten to bring any money with you, so you wrote a cheque.”

“But I’m always writing cheques.”

“You are. But this was for a tenner, and made out to the hotel. Hunt up your cheque-book and see how many cheques for ten pounds payable to the Ritz Hotel you wrote out between May the fifth and May the tenth.”

He gave a kind of gulp.

“Reggie,” he said, “you’re a genius. I’ve always said so. I believe you’ve got it. Hold the line.”

Presently he came back again.

“Halloa!” he said.