Professor William James says in his _Talks to Teachers_ that it is very difficult for most people to accept any new truth after the age of thirty; and that indeed old-fogeyism may be said to begin at twenty-five. It is perhaps therefore not surprising that, coming fresh to the subject at thirty-two--in 1905--I found the struggle to psychical truth a very long and arduous affair. Having been brought up on the ministrations of a hell-fire-preaching Nonconformist pastor whose theology made me into a very vigorous Huxleyan agnostic, I was biased against anything that savoured of "religion," and moreover "spiritualism" was unscientific and absurd. So I thought, in my ignorance; for I knew nothing whatever of the evidence on which spiritualistic beliefs are based. However, I fortunately ran up against hard facts which soon cured me of negative dogmatism. I became acquainted with a medium who satisfied me that she could diagnose disease, or rather her medical "control" could, from a lock of the patient's hair; and this without any information whatever being given. Also that the diagnosis often went beyond the knowledge of the sitter, thus excluding telepathy from anyone present or near. But this did not prove that the control was a spirit, so I turned to other investigations. First, I set myself to "read up". I feel sure that this is the best course for beginners to adopt, after once achieving real open-mindedness. It enables one to investigate with proper scientific care when opportunity arises, and with much better chance of securing good evidence. Without this preparation, an investigator has little idea how to handle that delicate machine called a medium, and indeed no amount of reading will entirely equip the experimenter, for there are many things which only experience can teach. Also, without this preparation, the investigator will be liable either to give things away by talking too much, or will create an atmosphere of suspicion and discomfort by being too secretive. It takes some practice to achieve an open and friendly manner while never losing sight of the importance of imparting no information that would spoil possible evidence. This of course is desirable from the medium's point of view as well as that of the sitter. It is hard on a medium if, for example, a really supernormally-got name does not count because the sitter himself had let it slip.