Nayland Smith correctly deduces that Professor Muller had received his supply of Blackhill poppy seeds from illegal drug trade. After Fu Manchu cut off the drug trade, the poppy seeds were mainly acquired from Hanuman - a warehouse owner who is secretly in cahoots with Fu Manchu. Nayland Smith meets Hanuman in his warehouse to question him on the whereabouts of Professor Muller. In Hanuman's office, Hanuman pulls a gun on Smith, who is able to knock him out before he can fire. Nayland Smith quickly leaves the building and deliberately avoids giving his attention to Hanuman's secretary, whom he recognizes as Lin Tang - Fu Manchu's daughter and partner-in-crime. Lin Tang recognized Nayland Smith when he entered the building, and she phoned Hanuman to kill Nayland Smith before their meeting in the office.