I am disposed to imagine, as Mr Abney would have said, that my manner in addressing him was brisker and more incisive than Mr Abney's own. I was irritated by his supercilious detachment.

'Throw away that cigarette,' I said.

To my amazement, he did, promptly. I was beginning to wonder whether I had not been too abrupt—he gave me a curious sensation of being a man of my own age—when he produced a silver case from his pocket and opened it. I saw that the cigarette in the fender was a stump.

I took the case from his hand and threw it on to a table. For the first time he seemed really to notice my existence.

'You've got a hell of a nerve,' he said.

He was certainly exhibiting his various gifts in rapid order, This, I took it, was what Mr Abney had called 'expressing himself in a curious manner'.

'And don't swear,' I said.

We eyed each other narrowly for the space of some seconds.

'Who are you?' he demanded.

I introduced myself.