Jan Yperman, became the first authority on surgery in the Low Countries during the 14th century. He was also the first medical writer in the Dutch language. He probably born in or near Ypres in Belgium, and may have studied in Paris under Lanfranc, whom he often mentions in his work. His work was first printed in Ann. Soc. Méd. Gand, 1854, 32, and re-issued as above. Another edition was published in Paris, 1936. Digital facsimile from Google Books at this link.