Tynsley Randolph Harrison was the editor of the first fifth editions of Harrison´s Principles of Internal Medicine, maybe the best known and most consulted teatise on Internal Medicine in the world.
He attended the University of Michigan and the Johns Hopkins School of Medicine. He did his Internship in the Peter Bent Brigham Hospital (later to be the Brigham and Women´s Hospital at Boston), and carried out his residency in Johns Hopkins and Vanderbilt.
He was a professor at the University of Alabama School of Medicine in Birmingham, Alabama for many years.
More of Him here:
http://en.wikipedia.org/wiki/Tinsley_Randolph_Harrison
