In the domain of his affections there does not appear to be any abnormality. O. is an excellent paterfamilias, adoring his children, but spoiling them badly at the same time. In this part of our examination we did not press for details, but as far as we have gathered he is capable of sympathies keenly felt though rarely sustained. Thus, whatever be the circumstances, changeableness, versatility, want of balance, are manifested clearly in all his mental operations; and when he remarks himself on the youthfulness of his disposition, he is simply stating a truism as far as those who tic are concerned, for, in spite of the advance of years, their mental condition is one of infantilism. Under our direction O. has devoted several months to the eradication of his tics, and he has not been slow to appreciate the aim of the method or to acquire its technique. One of the first results was the repudiation of various procedures more harmful than otherwise, and the successful endeavour to maintain absolute immobility for an increasing space of time. The outcome of it all has been a gradual diminution of the tics in number, frequency, and violence, and a corresponding physical and mental amelioration. We do not intend in this place to enlarge on the details of our treatment: suffice it to say that it consisted in a combination of Brissaud's "movements of immobilisation" and "immobilisation of movements" with Pitres's respiratory exercises and the mirror drill advocated by one of us. To-day the utility of these measures is an accepted fact; but at the same time we rely on an inseparable adjunct in the shape of mental therapeusis, seeking to make the patient understand the rationale of the discipline imposed. Our task has been lightened to an unusual degree through O.'s intimate acquaintance with the beginnings of his tics and his striking faculty of assimilation. On many occasions he has anticipated our intentions and of his own accord outlined a programme in harmony with the indications we were about to give him. Thanks to this happy combination of circumstances, the improvement effected by our treatment has been quickly manifested.