“I’m Scotch.”

“Really?” I said. “I never knew that before. Rummy how you don’t suspect a man of being Scotch unless he’s Mac-something and says ‘Och, aye’ and things like that. I wonder,” I went on, feeling that an academic discussion on some neutral topic might ease the tension, “if you can tell me something that has puzzled me a good deal. What exactly is it that they put into haggis? I’ve often wondered about that.”

From the fact that his only response to the question was to leap over the bench and make a grab at me, I gathered that his mind was not on haggis.

“However,” I said, leaping over the bench in my turn, “that is a side issue. If, to come back to it, you were in those bushes and heard what I was saying about you——”

He began to move round the bench in a nor’-nor’-easterly direction. I followed his example, setting a course sou’-sou’-west.

“No doubt you were surprised at the way I was talking.”

“Not a bit.”

“What? Did nothing strike you as odd in the tone of my remarks?”

“It was just the sort of stuff I should have expected a treacherous, sneaking hound like you to say.”

“My dear chap,” I protested, “this is not your usual form. A bit slow in the uptake, surely? I should have thought you would have spotted right away that it was all part of a well-laid plan.”