In December 1931 he married Marjorie Meehan, who was a medical student at the Johns Hopkins School of Medicine.
King and his family left Spain in March 1936, a few months before the outbreak of the Spanish Civil War.
After leaving Madrid, he did research on demyelinating diseases at the National Hospital for Neurology and Neurosurgery in Queen Square, London.
[3] From 1940 to the beginning of 1942 he worked as a pathologist at a Yale-affiliated Connecticut hospital and also taught pathology at Yale Medical School.
[citation needed] At the entry of the USA into WW II, King volunteered for the U.S. Army and was sent to El Paso, Texas, where he worked as a pathologist at the William Beaumont General Hospital.
[7] Toward the end of his life he lived in the Hallmark Retirement Community, located at 2960 N. Lake Shore Drive, immediately to the north of Lincoln Park in Chicago.