But I am woolgathering. Forgive me. I am not a literary man.

I had been in need of lodgings. That was how I met him. I wanted someone to share the cost of rooms with me. We were introduced by a mutual acquaintance, in the chemical laboratories of St. Bart’s. “You have been in Afghanistan, I perceive,” that was what he said to me, and my mouth fell open and my eyes opened very wide.

“Astonishing,” I said.

“Not really,” said the stranger in the white lab-coat, who was to become my friend. “From the way you hold your arm, I see you have been wounded, and in a particular way. You have a deep tan. You also have a military bearing, and there are few enough places in the Empire that a military man can be both tanned and, given the nature of the injury to your shoulder and the traditions of the Afghan cave-folk, tortured.”

Put like that, of course, it was absurdly simple. But then, it always was. I had been tanned nut-brown. And I had indeed, as he had observed, been tortured.

The gods and men of Afghanistan were savages, unwilling to be ruled from Whitehall or from Berlin or even from Moscow, and unprepared to see reason. I had been sent into those hills, attached to the-th Regiment. As long as the fighting remained in the hills and mountains, we fought on an equal footing. When the skirmishes descended into the caves and the darkness then we found ourselves, as it were, out of our depth and in over our heads.

I shall not forget the mirrored surface of the underground lake, nor the thing that emerged from the lake, its eyes opening and closing, and the singing whispers that accompanied it as it rose, wreathing their way about it like the buzzing of flies bigger than worlds.

That I survived was a miracle, but survive I did, and I returned to England with my nerves in shreds and tatters. The place that leech-like mouth had touched me was tattooed forever, frog-white, into the skin of my now-withered shoulder. I had once been a crack-shot. Now I had nothing, save a fear of the world-beneath-the-world akin to panic, which meant that I would gladly pay sixpence of my army pension for a Hansom cab rather than a penny to travel underground.