But these were experiments conducted in the normal state. Equally and even more interesting and conclusive results were obtained when the subject was placed under hypnotism. Of these, the most conclusive experiments were those conducted by Mrs. Sidgwick and Miss Alice Johnson. Put to the law of chance, it was shown that such coincidences were many hundreds, not to say thousands, of times more numerous than chance could account for. Then, again, we have the experiments at a great distance, in which Dr. Pierre Janet willed a patient of his to come through the streets, and she almost invariably came when he willed it. We have, too, a number of most interesting experiments in which _dreams_ have been induced in others--by trying to influence the sleeping thoughts of the dreamer. Here is a fruitful field, as yet hardly touched, for an experimenter in this line of research.[40] Among the most interesting and dramatic cases of the kind are those experiments in which one person has voluntarily caused a figure of himself to appear to another at a distance. Thus, A sits down and wills intently that he shall appear to B that night--in sleep or waking, as the case may be. The next morning A receives a letter from B, stating that he has seen an apparition of him, and asking him if he is well. The following is an example of a case of this character: "One certain Sunday evening in November, 1881, having been reading of the great power which the human will is capable of exercising, I determined with the whole force of my being that I would be present in spirit in the front bedroom of the second floor of a house situated at 22 Hogarth Road, Kensington, in which room slept two young ladies of my acquaintance, viz. Miss L. S. V. and Miss E. C. V., aged respectively twenty-five and eleven years. I was living at this time at 23 Kildare Gardens, at a distance of about three miles from Hogarth Road, and I had not in any way mentioned my intention of trying this experiment to either of the above ladies, for the simple reason that it was only on retiring to rest upon this particular Sunday night that I made up my mind to do so. The time at which I determined to be there was one o'clock in the morning, and I also had a strong intention of making my presence perceptible. "On the following Thursday I went to see the ladies in question, and in the course of conversation (without any allusion to the subject on my part) the elder one told me that on the previous Sunday night she had been much terrified by perceiving me standing by her bedside and that she screamed when the apparition advanced toward her, and awoke her little sister who saw me also...." (Corroborative evidence was obtained from the two ladies mentioned.)