In a remarkable little booklet, entitled, _Unseen Faces Photographed_, Dr. H. A. Reid has presented a number of cases of supposed spirit photography, some of which are certainly difficult to account for by any theory of fraud. It is true that the methods of imitating this process by fraudulent means are numerous and ingenious; but practically none of them are unknown. In _The Physical Phenomena of Spiritualism_, pp. 206-23, I have described these fraudulent methods in considerable detail; and have also published an account of a case in which trickery was actually detected in the process of operation. (See _Proceedings of the American S.P.R._, 1908, vol. ii., pp. 10-13.) But there seem to be certain cases on record that are most difficult to account for by any theory of trickery--partly because of the excellence of the conditions, and partly because of the character of the experimenter. Let us glance at one or two of the cases in which the character of the experimenter would seem to insure the fact that no conscious and voluntary fraud was practised. A resume of a few such cases is to be found in Mr. Edward T. Bennett's little book on _Spiritualism_, pp. 113-20.[23] I quote in part:-- "The most notable exception to this (rule of fraud) which I am able to quote is that of the late Mr. J. Traill Taylor, who was for a considerable time the editor of the _British Journal of Photography_. The following quotations are from a paper on 'Spirit Photography' by Mr. Taylor. It was originally read before the London and Provincial Photographic Association in March, 1893, and was reprinted in the _British Journal of Photography_ for March 26th, 1904, shortly after Mr. Taylor's death. He says:-- "'Spirit photography, so called, has of late been asserting its existence in such a manner and to such an extent as to warrant competent men in making an investigation, conducted under stringent test conditions, into the circumstances under which such photographs are produced, and exposing the fraud should it prove to be such, instead of pooh-poohing it as insensate because we do not understand how it can be otherwise--a position that scarcely commends itself as intelligent or philosophical. If, in what follows, I call it "spirit photography," instead of psychic photography, it is only in deference to a nomenclature that extensively prevails.... I approach the subject merely as a photographer.'