"He was very reluctant to continue the experiments, and used to complain that after exposing four plates with a view to obtaining such pictures he felt quite exhausted. And sometimes he complained that his 'innards seemed to be turned upside-down,' to use his own phrase. I usually sat with him between two and three in the afternoon, and on the days which I came he always abstained from the usual glass of beer which he took with his midday meal. If I came unexpectedly, and he had had a single glass of beer, which formed his usual beverage, he would always assure me that I need not expect any good results. I, however, never found any particular difference in the results. "We often discussed the matter together. And he was evidently working out a theory of his own, as any one might under such circumstances. He knew that when he was excited or irritated he got bad results. Hence he often used to keep a music-box going, for the music, in his opinion, tended to set up good and tranquil conditions. He said he thought something must come out of him--what, he did not know, but something was taken out of him, and with this something he thought the entities, whoever they were, built themselves up and acquired sufficient substance to reflect the rays of light so as to impress the sensitive plate in his camera. He also thought that his old camera had become what he called magnetized, and although it was an old-fashioned piece of furniture, which I not only examined myself, but have had examined by expert photographers, nothing could be discovered within or without it which would account for the results obtained. He also was of the opinion that even although he did not touch the photographic plate, it was necessary for him to touch or to hold his hand over the photographic slide, and also to hold his hand over the plate when it was in the developing bath. His theory was that in some way or other this process magnetized the plate and brought out a shadow portrait.