John Mercer Walker Sr. (January 15, 1907 – August 16, 1990)[1] was an American physician and investment banker.
Walker attended The Hill School[2] and later Yale University, where he lettered in football, baseball and squash, was a member of Skull and Bones,[3]: 164 and graduated in 1931.
[4]: 10 In 1936, Walker graduated from the Columbia University College of Physicians and Surgeons and went on to his residency at Roosevelt Hospital.
A local doctor advised them that treatment was futile, but Walker helped her get admitted to Memorial Sloan–Kettering.
So we treated her, and we watched her die before our eyes, but we also saw the wonders of remission and the dedication of the nurses and doctors, and we saw progress and we knew his advice was right.
Six months later when it was all over - I thought back with gratitude for this sensible advice ...[8]Walker had a second career as an investment banker.