William of Marseille was a thirteenth-century English academic, teaching in France. He is known for the medical-astrological treatise De urina non visa. The method is to use a horoscope to deduce properties of the urine of a patient for diagnosis, when the urine itself cannot be obtained. This book was still used at the University of Bologna in 1405.
From Liste lateinischer Autoren und anonymer Werke des 13. Jahrhunderts (ca. 1170-1320)