There is very little doubt that these visions of Mrs. Holland’s represented Mr. Gurney, who had died from an accidental dose of chloroform. Mrs. Holland “took very little interest” in Mr. Gurney, hence she had entirely forgotten that the main facts of his death had been told to her a few months previously by the narrator, Miss Alice Johnson.[19] In an hallucination of this sort we have a dramatic pictorial representation of previous though forgotten knowledge which must have determined it. In order to have determined the hallucination the knowledge must have been conserved somehow. I have frequently observed a similar reproduction of a forgotten experience, which was not visual, through translation into a newly created _visual_ representation in the form of an artificial hallucination. The following is of this kind: Miss B., looking into a crystal,[20] saw a scene laid in a wood near a lake, etc. Several figures appeared in this scene, which was that of a murder. Although she had no recollection of anything that could have given rise to the hallucination, investigation showed that the original experience was to be found in one of Marie Correlli’s novels which she had read but forgotten. The vision was a correct representation of the scene as described in the book. In suitable subjects almost any past experience, whether forgotten or not, can be reproduced in this way if conserved, and observation shows that the number which are conserved is enormous. I shall have occasion to cite further examples in other connections. The phenomenon of translation we shall find when we come to study it, as we shall do in another lecture, throws light upon the nature of conservation for here we are dealing with something more than simple reproduction; what is conserved becomes elaborated into a new composition.