The Mystery Of Mr. Wong (1939)

A wealthy gem collector (Morgan Wallace) gains possession of the largest star sapphire in the world after it has been stolen from China. At a party while playing a game of charade, he is shot dead but the gun contains blanks. Enter the eminent detective Mr. Wong (Boris Karloff) to solve the case. Based on the character in a series of magazine short stories by Hugh Wiley and directed by William Nigh (STRANGE CASE OF DR. RX). Detectives of Asian descent were popular in the 1930s. Although not as popular as Charlie Chan or Mr. Moto, Karloff taking a vacation from horror did three Mr. Wong movies. This entry isn't half bad. The mystery is good and the revelation of the murderer comes as a surprise and it all comes in at a compact one hour and 8 minutes. If you're into B (it's a Monogram production) murder mysteries, you should enjoy it. With Dorothy Tree, Grant Withers, Craig Reynolds, Chester Gan and Lotus Long.