Alexander Monro of Craiglockhart and Cockburn was a Scottish anatomist, physician and medical educator. To distinguish him as the second of three generations of physicians of the same name, he is known as secundus. His students included the naval physician and abolitionist Thomas Trotter. Munro was from the distinguished Monro of Auchenbowie family. His major achievements included, describing the lymphatic system, providing the most detailed elucidation of the musculo-skeletal system to date and introducing clinical medicine into the curriculum. He is known for the Monro–Kellie doctrine on intracranial pressure, a hypothesis developed by Monro and his former pupil George Kellie, who worked as a surgeon in the port of Leith.