Born in 1858 in Providence, Rhode Island, William Hilary Coston moved with his family to New Haven around the age of seven. After his father’s death, his mother worked as a laundress. Coston also worked various jobs in New Haven, including as a waiter, in the 1870s.
Coston attended public schools and then Hopkins Grammar School. (Sources are not clear, but he may have worked as a custodian at Hopkins as well.) He attended Payne Theological Seminary of Wilberforce University and earned his bachelor of divinity degree from Wilberforce in 1884. He then came to Yale and received a second bachelor of divinity degree in 1884.
Ordained in the AME Church in Wilberforce, Ohio, Coston served churches in Wisconsin, Minnesota, Iowa, Ohio, Pennsylvania, and Canada. During the Spanish-American War, he was appointed by President McKinley to serve as chaplain of the 9th U.S. Volunteer Infantry. He served as chaplain of the National Guard of the State of Ohio and was a Mason. From 1898 to 1912, he worked on behalf of the AME Church in Anacostia in Washington, DC, and later in business, retiring in 1932.
Coston was the author of several works: Betrayal of the American Negroes as Citizens, as Soldiers and Sailors, by the Republican Party in Deference to the People of the Philippine Islands; Freeman and Yet a Slave; and Spanish-American War Volunteer. He died in 1942 and is buried in Arlington National Cemetery in Washington, DC.
Image citation: The Spanish-American War Volunteer; Ninth United States Volunteer Infantry roster and muster, biographies, Cuban sketches (1899) by W. Hilary Coston, page 18