In a more recent paper, prepared with the co-operation of M. Ferrari and M. Hericourt, M. Richet has added a curious detail to the preceding experiments. He has shown that the subject on whom a change of personality is imposed not only adapts his speech, gestures, and attitudes to the new personality, but that even his handwriting is modified and brought into relation with the new ideas that absorb his consciousness. This modification of handwriting is an especially interesting discovery, since handwriting, according to current theories, is nothing more than a sort of imitation. I cite some examples borrowed from these authors. It is suggested in succession to a young student that he is a sly and crafty peasant, then a miser, and finally a very old man. While the subject's features and behavior generally are modified and brought into harmony with the idea of the personality suggested, we may observe also that his handwriting undergoes similar modifications which are not less marked. It has a special character peculiar to each of the new states of personality. In short, the graphic movements change like the gestures generally. In a note on the handwriting of hysterical patients, I have shown that under the influence of suggested emotions, or under the influence of sensorial stimulations, the handwriting of a hysterical patient may be modified. It gets larger, for example, in cases of dynamogenic excitation. The characteristic of the suggestion that we have just studied is that it does not bear exclusively on perception or movement--that is to say, on a limited psychic element; but there are comprehensive suggestions. They impose a topic on the subject that he is obliged to develop with all the resources of his intellect and imagination, and if the observations be carefully examined, it will also be seen that in these suggestions the faculties of perception are affected and perverted by the same standard as that of ideation. Thus the subject, under the influence of his assumed personality, ceases to perceive the external world as it exists. He has hallucinations in connection with his new psychological personality. When a bishop, he thinks he is in Notre Dame, and sees a host of the faithful. When a general, he thinks he is surrounded by troops, etc. Things that harmonize with the suggestion are conjured up. This systematic development of states of consciousness belongs to all kinds of suggestions, but is perhaps nowhere else so marked as in these transformations of personality.