_Charles Bernard_, Esq; Serjeant-Surgeon, AND Surgeon in Ordinary, to Her Majesty Queen _ANNE_. _SIR_, I look upon it as a peculiar Happiness, to live in an Age when Men of our Profession consider, that as the Art is capable of receiving daily Improvements; useful Discoveries, confirmed by Experiments, ought to receive the joint Concurrence of their good Wishes; notwithstanding, they may contradict an Opinion that has been almost universally received. These we shall always find, are the Gentlemen who in opposition to those Bigots whose Tempers discover them to be the Votaries of a few opinionative Men, endeavour to guide their Judgments by Reason, backed with judicious Observations, and whatever Arguments are produced, will never go about to controul Matters of Fact. It is a grand Truth that Necessity gave Being to _Physick_ and _Surgery_, and Experience is the only Way to bring them to Perfection; but it is much to be lamented by them that are Well-Wishers to those Arts that the Persons which are perhaps capable of advancing them most, devote themselves so much to speculative Fictions (the Effects of teeming Brains) that some have pretended with a magisterial Air to dictate, even to Experience itself. In such a Case it would be needless to go about to offer Arguments sufficient to disengage their Inclinations, Time only must discover to them their Error, when it makes them sensible they have, to no Purpose, persisted in the Pursuit of frivolous Niceties; for in reality, the Benefit of Mankind in general is deduced from Practical Truths. The Thoughts of this are sufficient to inspire every generous Soul with an ardent Desire of discovering something that may be of so universal an Advantage: As for my own Part, I was not animated to concern my self in the Undertaking I have engaged in, by a Prospect of gaining that Honour that is often liberally bestowed on those that mint new _Hypotheses_, or make new Discoveries; my only Design was to inform my self, whether some of those Diseases, which are generally reputed incureable, are not actually in themselves curable, and by this means to wipe off a Reproach which has been cast on Nature, when in reality it proceeds only from our own Weakness, and the Infirmity of our Art. A diligent Application to those Distempers which baffle us most, has been frequently recommended by very reputable Authors, and some of those who have obliged us with the Histories of _Diseased Persons_, have very often mentioned considerable Cures, which have been happily performed after the Patients have been looked upon by some as incurable. _Hippocrates_ tells us, _Lib._ 2 _Aph._ 52. _Si Medico secundum rectam Rationem Facienti, Curatio non statim succedat, non est tamen mutanda Methodus, quamdiu id restat quod à Principio visum est._ I am fully persuaded that most Practitioners in _Surgery_