The book is being addressed by Jean-Jacques Rousseau himself. The extraordinary degree of strength a momentary effervescence had given me to quit the Hermitage, left me the moment I was out of it. I was scarcely established in my new habitation before I frequently suffered from retentions, which were accompanied by a new complaint; that of a rupture, from which I had for some time, without knowing what it was, felt great inconvenience. I soon was reduced to the most cruel state. The physician Thieiry, my old friend, came to see me, and made me acquainted with my situation. The sight of all the apparatus of the infirmities of years, made me severely feel that when the body is no longer young, the heart is not so with impunity.