In the beginning Marthe plainly impersonated the ghost, as Baron Schrenck admits. He believes that she did it unconsciously. The sooner that excuse for fraudulent mediums is abandoned the better. She was quite obviously _not_ in a trance, though she pretended to be, throughout the whole three years. For smaller "ghosts" (white patches, streaks, arms, etc.) she used muslin, gloves, rubber--all sorts of things. As a rule, she knew when they were going to let off the magnesium-flare and photograph her. She had had ample time behind the curtain to arrange her effects. In one photograph, taken too suddenly, she has a white rag on her knee, which would look like a hand in the red light, and her real hand is holding the "ghost" over her head! After that Baron Schrenck sadly admitted that she used her hands. Mme. Bisson does not; so Sir Arthur does not know this. In another photograph she is supposed to accept a cigarette in a materialized third hand. It is obviously her bare foot, and, if you look closely, you see that her "face" is a piece of white stuff pinned to the curtain. She is really leaning back and stretching up her foot. The book reeks with cheating. After a time she began to stick or paste on the cabinet or the curtain pictures cut out of the current illustrated papers, and daubed with paint, provided with false noses, or adorned with beards and moustaches. President Wilson has a heavy cavalry moustache and a black eye; but the glasses, collar, tie, and tie-pin, and even the marks of the scissors, are unmistakable. Baron Schrenck was forced to admit that dozens of pinholes were found (not by him) on the cabinet-wall, and that the pins must have been smuggled in, deceptively, in spite of a control which he claimed to be perfect. In fact, poor Baron Schrenck was driven from concession to concession until his case was very limp. Of all these things Sir A. C. Doyle knew nothing; and, although he had the portrait of President Wilson in his hands at the Queen's Hall, only disguised by a moustache and a few daubs of paint, he assured the audience he believed that it was the ectoplasm of the medium's body moulded by spirit forces into a human form!