The most important contribution to the discussion which followed was made by Sir William Barrett, who demonstrated that the result could be duplicated by taking a several minutes’ exposure of a chair, in which someone was seated for a part of the time. The sitter would naturally not keep quite still; hence the outlines would be blurred and the features indistinct. Sir William published a photograph which he had obtained in this way, reproducing the features of the Combermere photograph, even to the leglessness. He suggested that someone, possibly one of the four men-servants in the Abbey, had entered the library during the prolonged exposure. He had sat down in the chair for a minute or so, when, noticing the camera, he beat a retreat. The photograph showed double outlines to all the sharp edges, indicating that the camera had been moved slightly during the exposure, and suggesting that someone had entered the room and jarred it. As it was eight months after the event that the photograph was developed, it was impossible to ascertain whether anyone _did_ actually so enter the room. In any case it was a remarkable coincidence, but there is no proof of it being anything more. A somewhat similar case is recorded by Podmore. The photograph was being taken, this time, in a chapel. On development a faint face was seen framed in a panel. This was described as being the likeness of a friend of the photographer’s who had recently died--“a handsome, melancholy lad of eighteen.” Another critic thought that the face was that “of a woman of thirty”; it must have been very indistinct. It may well have been caused in the same manner that was suggested for the Combermere photograph; a visitor to the chapel standing in the field of the camera for some moments, probably not realising that an exposure was in progress. Several accounts have been given by amateurs of seeing spirit faces develop, only to disappear again on fixing; one such is published in Vol. VII. of the _J.S.P.R._ These are evidently of a subjective nature, the finished negative showing no evidence of any abnormality. If any reader of this article knows of any case where an “extra” has been obtained in the absence of a professional medium, and where the plate can be produced, I should be very grateful for particulars.