The words "dream interpretation" were and still are indeed fraught with unpleasant, unscientific associations. They remind one of all sorts of childish, superstitious notions, which make up the thread and woof of dream books, read by none but the ignorant and the primitive. The wealth of detail, the infinite care never to let anything pass unexplained, with which he presented to the public the result of his investigations, are impressing more and more serious-minded scientists, but the examination of his evidential data demands arduous work and presupposes an absolutely open mind. This is why we still encounter men, totally unfamiliar with Freud's writings, men who were not even interested enough in the subject to attempt an interpretation of their dreams or their patients' dreams, deriding Freud's theories and combatting them with the help of statements which he never made. Some of them, like Professor Boris Sidis, reach at times conclusions which are strangely similar to Freud's, but in their ignorance of psychoanalytic literature, they fail to credit Freud for observations antedating theirs.