William of Marseille[1] was a thirteenth-century English academic, teaching in France.
He is known for the medical-astrological treatise De urina non visa.
[2] 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.
[3] This book was still used at the University of Bologna in 1405.
[4] From Liste lateinischer Autoren und anonymer Werke des 13.