Hanuman regains consciousness, then he and Lin Tang go underground to a secret base under the River Thames. There, Lin Tang informs her father that his nemesis Nayland Smith has gotten involved in their plans. Lin Tang informs Fu Manchu that their prisoner Professor Muller has refused to divulge how to extract the poisonous essence from the Blackhill poppy seeds. To coerce Professor Muller, Fu Manchu has his henchmen kidnap the professor's daughter Maria. After both prisoners are forced to watch one of Fu Manchu's henchwoman drown (as the henchwoman's punishment for trying to free Professor Muller), Professor Muller then reveals that documents detailing the properties of the Blackhill poppy were given to Professor Gaskel by the Grand Lama. The documents were given during the Younghusband expedition that Professor Muller resents not being a part of. The documents are currently locked in a vault that only Professor Gaskel has access to. The vault is in a guarded room of the Museum of Oriental Studies.