Five hours later, when Mr Long's feng shui expert pushed himself back from the paper-laden library desk, the trees in the garden behind him had not been visible for some time.

His name was Ming, and he was a doctor of some kind or other, although apparently not including medical. Long's every gesture made it abundantly clear that the old scholar was one of the most important individuals in the Chinese community, and that it was an unheard-of honour for the practitioner to come to a Western house for a consultation. The three barbarians expressed their proper gratitude, which the scholar waved aside with a gracious hand. He seemed, if anything, amused at Long's solicitous behaviour, and interested in everything around him.

Particularly in Holmes. The old man stood before the English detective with an enigmatic look on his ageless features, the lips beneath their wisps of beard twisted in what might have been distaste, or amusement. His first words did not make the attitude any clearer.

“This low-born servant is unspeakably honoured at this opportunity to meet the English High Prince of Hawkshaws,” he said. His audience looked startled, at the flowery speech as much as at this unlikely reference to low detective fiction; even Long seemed taken aback.

Hammett got the joke first, and let loose a snort of smothered laughter. Holmes, looking more closely at the visiting sage, deliberately continued extending his hand, a motion that had been interrupted by the man's flowery words.

“The Savant of the Breath of Dragons is of course welcome to take amusement at the expense of this humble thief-taker,” he replied, and Ming nodded, the twist of his mouth finally becoming a smile.

Dr Ming was a thin, elderly gentleman with white hair that flowed from his high forehead down over the collar of his beautifully cut Western suit, a back straight and flexible as bamboo, and delicate hands that seemed to fold themselves together into the sleeves of an invisible robe. His English was fluent and precise, although accented, and he emanated a Mandarin sensibility in everything he did, from opening the cover of one of Judith Russell's garden journals to picking up a cup of the pale green tea Long had thought to bring with him. Watching him make notes with his silver mechanical pencil was like witnessing the art of a master water-colourist, the meditation of precise and delicate strokes.

He was not, however, speedy.