Son of David Hayden and Elizabeth (Emmons) Foster.
Born: February 13, 1850 in Lima, Ohio.
Died: 1940 in Mount Vernon, Illinois.
Census: 1850 - German Township, Allen County, Ohio.
Military Service: In 1862 and 1863, Sylvanus ran more than once, and was finally admitted, at age 13, to Company D of the 151st Ohio Volunteer Infantry, as a fifer. He was active the the GAR for fifty years, and in 1938 was the oldest living Civil War veteran in Jefferson County.
Occupation: Cabinet Maker.
Married: (1) Matilda Reeves Davis January 2, 1870 in Graysville, Illinois.
(2) Eliza Ann Haney February 13, 1889 in Unknown.
(3) Nancy Caroline Terry May 2, 1905 in Lima, Ohio.
(4)Eva Washington Williams May 2, 1925 in Unknown.