deceit with false medicine). In 1584 he managed to convince the Delft magistrates to place rules and restrictions on the practice of medicine. During his practice years in Alkmaar, Forestus began to take notes on the maladies of his patients, and how he treated them. Later he arranged the data and eventually collected over 1350 Observationes with appropriate Scholia. The Observationes were personal perceptions of patients and diseases, and formed the basis for the subsequent Scholia, initially dedicated as a separate monograph to personal acquaintances such as Prince Maurice of Orange, and city governments, like those of Alkmaar, Delft, Leiden, Amsterdam and Enkhuizen. In 1609 all his monographs and the treatise on uroscopy were bundled and published in Frankfurt as the Opera Omnia. Numerous reprints followed. Sources (1852): Petrus Forestus in De Navorscher, second edition, Frederik Muller, Amsterdam (1950): Het oude geslacht Van Foreest, Van Gorcum & Comp. N.V., Assen (1989): Pieter van Foreest; Een Hollands medicus in de zestiende eeuw, Rodopi, Amsterdam (1997) "Pieter Van Foreest, The Dutch Hippocrates ," Vesalius 3 (1), pp. 3–12. (1996): Pieter van Foreest; De Hollandse Hypocrates, Print Knijnenberg, Krommenie (2005): De Heeren van Alkmaer; Regeerders en regenten, vroedschap en raad 1264-2005, Municipality Alkmaar, Alkmaar 1521 births 1597 deaths 16th-century Dutch physicians 16th-century Latin-language writers People from Alkmaar Van Foreest family Physicians of the Habsburg Netherlands