In 1931, the London Spiritualist Alliance (LSA) examined Duncan's method. An early examination of pieces of Duncan's ectoplasm revealed it was made of cheesecloth, paper mixed with the white of egg and lavatory paper stuck together. One of Duncan's tricks was to swallow and regurgitate some of her ectoplasm, and she was persuaded to swallow a tablet of methylene blue before one of her séances by the LSA committee to rule out any chance of this trick being performed, and because of this no ectoplasm appeared.. The committee in a report concluded that the "material was swallowed by Mrs Duncan at some time previous to the sitting and subsequently regurgitated by her for the purpose of exhibition."