From the History of Homoeopathy and its Institutions in America, Volume IV, Edited by William Harvey King, M. D., LL. D., 1905: Oliver Shepard Barnum, Los Angeles, California, was born in Pine Plains, New York, March 12, 1867, the son of Rev. F. S. and Esther (Lee) Barnum. His literary education was acquired in the Hartford Connecticut high school and in Princeton University, graduating from the latter in 1890. He studied for his profession in the Albany Medical College and in the New York Homoeopathic Medical College and Hospital, from the latter of which he graduated in 1893 with the degree of M. D. Dr. Barnum is president of the American Electro-Medical Society, and of the Southern California Electro-Medical Society. He holds membership in the California State Homoeopathic Medical Society, the American Roentgen Ray Society, the American Institute of Homoeopathy, and the Southern California Academy of Sciences. He is now in practice in Los Angeles, and makes a specialty of electro-therapeutic and x-ray work. He is the inventor and designer of several forms of apparatus used extensively in electrical and x-ray work. In 1896, he married Mary Hawes Gilmore of Pasadena, California.
From the Los Angeles Times, March 23, 1928: Of Alhambra, March 22, 1928, Dr. Oliver S. Barnum, aged 61 years, a native of New York, beloved husband of Mary G. Barnum.