Quacks still abounded in London, and there were three in particular, a German, an Italian Jew, and a Scot, whose names became household words. The German, Dr. Myersbach, revived the lost art of urinoscopy. The water-casting, or diagnosing a patients ailments and prescribing treatment solely from an inspection of the urine, was a procedure of venerable antiquity. So-called physicians contemporary with Rhazes and Avicenna had no difficulty in forecasting the sex of an unborn child from the prospective mothers urine. Certain of the early writers of the School of Salerno produced long treatises on urinoscopy. In the Middle Ages the urinal was the emblem of medical practice, and was even used as a convenient sign-board device. Innumerable works of art testify the diagnostic importance of inspection of urine at this period (see plate facing p. 288). In the early Renaissance period uromancy was still a popular diagnostic method, but towards the end of the seventeenth century it fell into a deserved disrepute. Myersbach was an M.D. of Erfurth in Germany. The exact value of this doctorate was not known in England, but a young man travelling in Germany had no difficulty in obtaining it for one Anglicus Ponto. After paying the necessary fees and receiving the degree in all solemnity, he revealed the fact that Ponto was his favourite mastiff. Myersbach reached London about 1774, and rapidly proceeded to accumulate a fortune. After two years of affluent immunity from all criticism, he was attacked by John Coakley Lettsom, then a young Quaker physician. Lettsom was one of the founders of the Medical Society of London, and played a large part also in the founding of the Royal Humane Society, which had as its immediate object the Recovery of Persons who are suppose[d] Dead of Drowning. Lettsom, if he had never achieved anything at all, would have been remembered by Lord Erskines neat rhyme, prompted by the way in which he signed himself I. Lettsom :
Whenever patients come to I,
I physics, bleeds, and sweats em.
If, after that, they choose to die,
Whats that to me? I.Lettsom.