Dr. Newsholme in his opening lines proposes, through a study of encephalitis lethargica, to throw 'a flood of light on the working of the mind in its relation to the body'. The statement evokes a sympathetic attitude on the part of the analyst who is familiar in his daily practice with the reciprocal relationship between mind and body. The analyst is well aware of the complicated nature of this relationship and of how many problems there remain for solution, towards which psycho-analysis has made only tentative efforts towards an understanding. And as to encephalitis lethargica, the analyst is as much in the dark as the pathologist and the clinician.

But the next pages suffice to disturb one's sympathetic attitude. The essayist gives a brief account of twelve cases of the disease, accompanied by a short description of the patient's temperament and of mental factors that did or were said to coincide with the onset of the illness. A girl of