I once drew a character called “Dr. Broadley,” who, excellent man though he was in some respects, put on a “stalk” when he came in contact with a nervous patient. Now, three different people thought they recognised Dr. Broadley, and informed me of the fact. They were all wrong. Not one of their three supposed models had sat to me for his portrait. I am forced, against my will, to the conclusion that there are in existence a superfluous number of persons who make the proximity of an invalid the excuse for displaying unnecessary airs. Surely it is not by such an influence, such an example, that the morals of our patients are to be improved. I once put together two small prayer-books, so that the coloured edges of the leaves were divided only by the edge of the thin cover of each book. The leaves of one were of a bright golden colour; those of the other had been tinted a dull red. The books were momentarily held up for observation, with this interesting result. The leaves of the one book were seen correctly, so far, at least, as their colour was concerned; for they were unhesitatingly declared to be tinted with bright gold. The leaves of the other, however, were with equal readiness declared to be of a _golden_ red colour. It is easy to understand how this mistake arose. The golden colour was the first perceived, and the impression made by the dull red was not strong enough in comparison to be correctly seen and retained in a brief moment. The bright gold of the one book had so powerfully affected the retina that the colour was cast, so to speak, on to the leaves of the other book. These therefore appeared to be golden red in tint, instead of the dull red they were in reality. On another occasion a small smooth cake was placed in a dish together with several large almond-cakes. When attention was attracted to it, it was mistaken for a cocoanut cake. Here a rapid inspection had sufficed to show that one cake was smaller than the others. It had not sufficed to show the great difference in its construction. The large cakes had been first perceived, and their roughness was erroneously seen to be shared by the small cake. Some people go through life with their minds so completely lined by a series of crystallised impressions, that no aftercomers have the smallest chance of even combining with them to produce a half-truth, to say nothing of overcoming them to a sufficient extent to drive out the errors and replace approximate truths by others still truer. It may be objected that the above failures in perception of differences (a much more difficult thing than perception of similarities[7]) was occasioned solely by the speed with which the observations were made. I entertained a contrary belief, and my belief was confirmed by the following example of my own capacity for disgraceful blundering.