I passed three or four years in this manner, between music, magestry, projects, and journeys, floating incessantly from one object to another, and wishing to fix though I knew not on what, but insensibly inclining towards study. I was acquainted with men of letters, I had heard them speak of literature, and sometimes mingled in the conversation, yet rather adopted the jargon of books, than the knowledge they contained. In my excursions to Geneva, I frequently called on my good old friend Monsieur Simon, who greatly promoted my rising emulation by fresh news from the republic of letters, extracted from Baillet or Colomies. I frequently saw too, at Chambery, a Dominican professor of physic, a good kind of friar, whose name I have forgotten, who often made little chemical experiments which greatly amused me. In imitation of him, I attempted to make some sympathetic ink, and having for that purpose more than half filled a bottle with quicklime, orpiment, and water, the effervescence immediately became extremely violent; I ran to unstop the bottle, but had not time to effect it, for, during the attempt, it burst in my face like a bomb, and I swallowed so much of the orpiment and lime, that it nearly cost me my life. I remained blind for six weeks, and by the event of this experiment learned to meddle no more with experimental Chemistry while the elements were unknown to me. This adventure happened very unluckily for my health, which, for some time past, had been visibly on the decline. This was rather extraordinary, as I was guilty of no kind of excess; nor could it have been expected from my make, for my chest, being well formed and rather capacious, seemed to give my lungs full liberty to play; yet I was short breathed, felt a very sensible oppression, sighed involuntarily, had palpitations of the heart, and spitting of blood, accompanied with a lingering fever, which I have never since entirely overcome. How is it possible to fall into such a state in the flower of one's age, without any inward decay, or without having done anything to destroy health?