Similar experiments have been recorded by, amongst others, Dr. J. Héricourt,[1] a colleague of M. Richet in the editing of the _Revue Scientifique_, Dr. Dusart,[62] and Dr. Dariex.[63] In the last case there were only five trials, the experiments being then discontinued at the request of the patient. The first three trials were completely successful, the sleep supervening within, at most, a few minutes of the time chosen by the agent. The following narrative resembles those cited above in its general features. But in view of the nature of the effect produced--a painful hysterical attack--it is perhaps hardly a matter for regret that the case is without any exact parallel. No. 31.--By DR. TOLOSA-LATOUR. In this account, taken from a letter written to M. Richet by Dr. Tolosa-Latour on the 5th March 1891 (_Annales des Sciences Psychiques_, Sept.-Oct. 1893), Dr. Latour explains that he had repeatedly hypnotised a lady who was seized in September 1886 with hysterical paralysis, and had ultimately succeeded in effecting by this means a complete cure. Prior to his treatment, in 1885, she had suffered for some time from daily hysterical attacks, and when she came under Dr. Latour she was still occasionally subject to them, and found relief in the hypnotic sleep. Both symptoms had at the time which he writes almost completely disappeared. "I had made some very curious experiments, but I had never thought about either action at a distance or clairvoyance. It was while leaving Paris and reading your [M. Richet's] pamphlet in the carriage that the idea occurred to me of sending Mdlle. R. to sleep. It was Sunday, October the 26th, the very day of my departure. I remember the hour too; it was just before reaching Poitiers, where some relations of my grandmother were expecting me. I told my wife that I was going to try the experiment, and begged her to say nothing about it to any one. I began to fix my thoughts about six o'clock, and during the journey from Poitiers to Mignie (where we stayed several days) I again and again thought of this question, especially during the intervals of silence which always occur during a journey. "I wished to cause a violent hysteric attack, as I knew that she had not been dangerously ill for a long time. So on Sunday, October the 26th, from six till nine o'clock in the evening, I fixed my thoughts intently on the experiment.