The Brother Of Heaven

Published in Pearson's Magazine (UK - Oct. 1933). Reprinted in the anthology Best Crime Stories (1934) and later in Ellery Queen's Mystery Magazine (US - Mar. 1948). Collected in the book The Duel of Shadows.
The stabbing death of the Chinese man Lek Su in a deserted riverside warehouse was unfortunate but not unheard of. What was interesting was the possessions on him, including a small pouch containing a silver token showing him to be a freemason in the society of the Brothers Of Heaven. Barnabas Hildreth is brought into the case by the C.I.D., though they had no "especial yearning for a Secret Service agent" to enter their case.