Bingo started violently. A wild gleam came into his eyes. And before I knew what he was up to he had brought down his hand with a most frightful whack on my summer trousering, causing me to leap like a young ram.

“Here!” I said.

“Sorry,” said Bingo. “Excited. Carried away. You’ve given me an idea, Bertie.” He waited till I had finished massaging the limb, and resumed his remarks. “Can you throw your mind back to that occasion, Bertie? Do you remember the frightfully subtle scheme I worked? Telling him you were what’s-her-name, the woman who wrote those books, I mean?”

It wasn’t likely I’d forget. The ghastly thing was absolutely seared into my memory.

“That is the line of attack,” said Bingo. “That is the scheme. Rosie M. Banks forward once more.”