The Christian era introduced some light into the medical, as well as the religious world; yet we learn, by both sacred and profane writers, that truth and knowledge were the exceptions, and ignorance and humbug were the rule by which medicine was practised by those who pretended to the art. Names changed, characters remained the same. The priests still held their own, and were not, as already shown, to be gotten rid of, as the witches and wizards, their rivals and imitators, by litigation, nor was their power broken until the Decree of the Council of Tours in 1163 A. D., which prohibited priests and deacons from performing certain surgical operations. After the Reformation the vocations of spiritual and medical adviser diverged wider and wider, until now a priest or minister is seldom consulted for bodily infirmities, and only by persons of the most ignorant and superstitious denominations. Setting the priesthood aside did not suppress humbugs in medicine. In fact the profession went into disrepute, which the priests hastened, and a lower order of people took upon themselves the practice of deceiving the sick and afflicted. Now and then a greater humbug than common would spring up, and for a time draw the rabble after him, till the next arose to eclipse him. From the discovery of America to about 1600, ambitious upstarts, humbugs, and seekers of fame and fortune were drawn away from the old world, and either for this reason, or because the biographers were attracted to a more interesting field, accounts of medical celebrities are very meagre; but from the latter period to the present day there has been no lack of records from which to draw our material. During the 17th and 18th centuries medical impostors had things all their own way. Ignorance was no hinderance to advancement, socially or pecuniarily. Some men published, in their own names, voluminous works, in both English and Latin, which they themselves could not read. By soft words and cunning arts others gained high positions, and, without knowledge of the first branch of medical science, became "court physicians." From the lowest walks, they rose up on every side: from the cobbler's bench, and the tailor's board; from cutting up meat in the butcher's shop, to "cutting up" naughty boys in a pedagogue's capacity; from shaving the unwashed rabble behind the striped barber's pole, to shaving their wives behind counters, where they measured the cloth of the weaver, they became cobblers of poor healths, butchers of men, and shavers of the invalided public. But these will be discoursed of under another head.