It is not because the more ancient writers had omitted anything relative to the Art that I have composed this work, but in order to give a compendious course of instruction; for, on the contrary, everything is handled by them properly, and without any omissions, whereas the moderns have not only in the first place neglected the study of them, but have also blamed them for prolixity. Wherefore, I have undertaken the following Treatise, which, it is like, will serve as a commentary to those who may choose to consult it, whilst it will prove an exercise to me. For it appears strange that lawyers should be possessed of compendious and, as they call them, popular legal synopses, in which are contained the heads of all the laws, to serve for immediate use, whilst we neglect these things, although they have it generally in their power to put off the investigation of any point not only for little but even for a considerable time, whereas we can seldom or very rarely do so; for, in many cases, necessity requires that we act promptly, and hence Hippocrates has properly said, “the season is brief.” (Aph. 1, i.) For their business is generally conducted in the midst of cities, where there is an abundant supply of books, whereas physicians have to act not only in cities, in the fields, and in desert places, but also at sea in ships, where such diseases sometimes suddenly break out as, in the event of procrastination, would occasion death, or at least incur the most imminent danger. But to remember all the rules of the healing art, and all the particular substances connected with it, is exceedingly difficult if not altogether impossible. On this account I have compiled this brief collection from the works of the ancients, and have set down little of my own, except a few things which I have seen and tried in the practice of the art. For being conversant with the most distinguished writers in the profession, and in particular with Oribasius, who, in one work, has given a select view of everything relating to health (he being posterior to Galen, and one of the still more recent authors), I have collected what was best in them, and have endeavoured, if possible, not to pass by any one distemper. For the work of Oribasius, comprehending seventy books, contains indeed an exposition of the whole art, but it is not easily to be procured by people at large on account of its bulk, whilst the epitome of it, inscribed to his son Eustathius, is deficient in some diseases altogether, and gives but an imperfect description of others, sometimes the causes and diagnosis being omitted, and sometimes the proper plan of treatment being forgotten, as well as other things which have occurred to my recollection. Wherefore the present work will contain the description, causes, and cure of all diseases, whether situated in parts of uniform texture, in particular organs, or consisting of solutions of continuity,