Before narrating the case which is the basis of this communication, I shall briefly advert to the leading features, and the views held regarding the nature of the remarkable neurosis with whose discovery the name of the late eminent Dublin Professor, Dr. Graves, is most frequently associated. The dependence of the psychical and somatic phenomena on one cause, common to both, will thus be more clearly demonstrated, and the claim which it seems to me the disorder of the mind has to be regarded as a distinct form of insanity will be more apparent.