I don't know.

Talk about the impassive Red Indian! A thoroughbred Chink would give a Pawnee chief one glass eye and a coat of paint, and then beat him hollow at the haughty indifference game." "My!" said Winter admiringly, "you've got your tongue loose today.

Well, here's an item which should prove useful.

Whitechapel thinks we may find a Young Manchu or two among that collection," and he threw an official memorandum across the table.
Furneaux repocketed the skull, and was gazing moodily at the report, when a uniformed constable announced that a boy messenger wished to see a "detective" with regard to the typed letter delivered at Mr.Forbes's house on Wednesday evening.
"Show him up," said the chief, and a smart-looking boy, wearing the familiar uniform of his corps, was brought in.

He glanced around inquiringly.
"Oh, you're the gentleman who came to our Piccadilly office," he said to Winter.
"Yes." "Well, sir, I haven't very much to tell you, but it was I who took the letter to Fortescue Square.