Diwan Sahib said it reminded him of a curious, very old man at the Nawab of Surajgarh’s court, who had been there since the Nawab’s father’s time, and who wore brown clothes and a green pugree and had a face as cavernous as a starving man’s. He walked long hours in the forest and came back with cloth bags full of plants that he disappeared with into his laboratory, which was a quack’s den filled with glass flasks and Bunsen burners and test tubes and vernier callipers, and where, in the instant when the door opened a crack as he slid in, the smells that trickled out were of a kind that existed only in hallucinations and nightmares, so that when he shut the door you wondered if you had imagined them. It was rumoured that he manufactured poisons in that den, and the rumour was strengthened by the inexplicable decline or death from time to time of people at the court who had fallen foul of the Nawab. The Nawab had claimed that the man made medicine, Diwan Sahib said, but the line betwe...