My declining years having in a great measure released me from those medical fatigues, in which, for the publick good, (at least as I hope) I have been employed about fifty years, I have determined to pass the short remains of life in such a sort of leisure, as may prove neither disagreeable to myself, nor useless to others. For good men are of opinion, that we must give an account even of our idle hours, and therefore thought it necessary, that they should be always well-spent. Having from my earliest childhood entertained a strong passion for learning, after I had chosen the art of medicine for my profession, I still never intermitted my literary studies; to which I had recourse from time to time, as to refreshments strengthening me in my daily labours, and charming my cares. Thus, among other subjects, I frequently read the holy scriptures, as becomes a christian; and next to those things which regard eternal life, and the doctrine of morality, I usually gave particular attention to the histories of diseases, and the various ailments therein recorded; comparing those with what I had learnt either from medical writers or my own experience. And this I did the more willingly, because I had remarked that divines, thro’ an unacquaintance with medicinal knowledge, frequently differed widely in their sentiments; especially on the subject of dæmoniacs cured by the power of our saviour Jesus Christ. For it is the opinion of many, that these were really possessed with devils, and that his divine virtue shone forth in nothing more conspicuous than in expelling them. I am very far from having the least intention to undermine the foundations of the christian doctrine, or to endeavour, by a perverse interpretation of the sacred oracles, to despoil the Son of God of his divinity, which he has demonstrated by so many and great works performed contrary to the laws of nature. Truth stands no more in need of the patronage of error, than does a natural good complexion of paint. And it is certain, that the opinion which has been prevalent for many ages, of the power granted to devils, of torturing human bodies and minds, has been several ways made subservient to the subtle designs of crafty men, to the very great detriment and shame of the christian religion.