In view of the re-assertion by M. Encausse in the ' Revue-de Psychiatric' of the absolutely incorrect statement that the persons on whom I experimented were any other than the actual subjects introduced to me by Dr. Luys himself at the Charite, and the pretension that they were persons whom Dr. Luys had discarded, I think it well to reprint the letters from Dr. Luys and myself which were-published in the 'Times,' and in which Dr. Luys, after having brought forward that unfounded statement, was unable to support it. Two of the subjects on whom I experimented were actual patients in the wards; they were all five the subjects, and the only subjects, on whom Dr. Luys gave his demonstrations to myself and to a number of journalists and medical men in December and January, and three of them were subjects on whom he had continuously lectured for many years, and whose various ante-performances will be found figured and described at great length in his papers and Clinical Lectures to which I have referred in the text. Clarice and Jeanne especially are reproduced in a great number of photographs.

Jeanne, whose letter I print on p. 147, is perhaps the most hardened and elaborate impostor of the series, and she is the central figure in the photographs on pp. 99 and 101, and which Dr. Luys gave me with his own hands, having brought them, as he said, for me, to illustrate the striking effects of attraction and repulsion by the two ends of the magnetic bars; a phenomenon which I proved, and invited him to prove, by very simple means, to be pure fraud. Having declined to apply any of the very simple tests suggested to him by me in the wards, by which he could easily have ascertained for himself the thorough imposture of his subjects, it ill becomes Dr. Luys to complain that I was incompetent, or that in applying simple and accurate scientific tests I was doing anything more than he ought to have done long since out of respect to his own assumed position of a man of science, and to the honour of the science of medicine and the reputation of the great hospital, which the continuance of these fictitious performances seriously discredits.