My friend said nothing. He walked back to the corpse and picked up its hands, one after the other. The fingertips were clean of ichor. “I think we have established that the word was not written by His Royal Highness-”

“What the Devil makes you say-?”

“My dear Lestrade. Please give me some credit for having a brain. The corpse is obviously not that of a man-the color of his blood, the number of limbs, the eyes, the position of the face, all these things bespeak the blood royal. While I cannot say which royal line, I would hazard that he is an heir, perhaps…no, second in line to the throne…in one of the German principalities.”

“That is amazing.” Lestrade hesitated, then he said, “This is Prince Franz Drago of Bohemia. He was here in Albion as a guest of Her Majesty Victoria. Here for a holiday and a change of air…”

“For the theaters, the whores, and the gaming tables, you mean.”

“If you say so.” Lestrade looked put out. “Anyway, you’ve given us a fine lead with this Rachel woman. Although I don’t doubt we would have found her on our own.”

“Doubtless,” said my friend.

He inspected the room further, commenting acidly several times that the police, with their boots, had obscured footprints and moved things that might have been of use to anyone attempting to reconstruct the events of the previous night.

Still, he seemed interested in a small patch of mud he found behind the door.

Beside the fireplace he found what appeared to be some ash or dirt.

“Did you see this?” he asked Lestrade.

“Her Majesty’s police,” replied Lestrade, “tend not to be excited by ash in a fireplace. It’s where ash tends to be found.” And he chuckled at that.

My friend took a pinch of the ash and rubbed it between his fingers, then sniffed the remains. Finally, he scooped up what was left of the material and tipped it into a glass vial, which he stoppered and placed in an inner pocket of his coat.