Miller, Edwin Haviland. "Introduction." The Correspondence of Walt Whitman: Volume I, 1842-1867. Ed. Edwin Haviland Miller. New York: New York University Press, 1961. 1-18.
Fred Gray, the son of prominent New York doctor Dr. John F. Gray and Elizabeth Hull-Gray, was born in New York in 1840. His two siblings died before they reached adulthood.