Arguably the real father of endocrinology lived a generation before Brown-Séquard. Thomas Addison (1793–1860) was one of a trio of outstanding doctors, known as the Three Greats, at Guy’s Hospital in London in the 1830s. The others were Richard Bright, discoverer of Bright’s disease (now called nephritis), and Thomas Hodgkin, who specialized in disorders of the lymphatic system and whose