Autograph Medical Prescription and instructions, signed ‘G.Andral’. In French. 2 pp., in good condition. 1842. Gabriel Andral (1797-1876), distinguished French pathologist. He is considered to be the founder of scientific hematology, and is credited with its integration into clinical and analytical medicine. Andral’s crowning written achievement was Clinique médicale, a five-volume work that discussed almost every facet of medicine known at the time.