From the 1885 History of Steuben County, Indiana  page 745

David S. Gillespie, section 5, Salem Township, was born in Lorain County, Ohio, April 14, 1834, a son of James and Eve (Worman) Gillespie.  James Gillespie was born in Ireland, and when a child his parents came to the United States and located in the state of New York.  Later the family moved to Erie County, Pennsylvania.  He was a soldier in the War of 1812.  When a young man he emigrated to Ohio and lived several years in Stark County, where he was married.  In October, 1844, he moved with his family to Steuben County, Indiana, and settled in Jackson Township where he died in 1852.  His wife is living in Alliance, Ohio.  They had a family of seven children, all save one daughter living till maturity.  David S. is the only resident of Steuben County, and has made this his home since coming with his father.  He remained on the homestead until 1860, when he bought the farm on section 5, Salem Township, where he now lives.  Mr. Gillespie owns 40 acres of valuable land with good improvements, all made by his own industry and good management.  He enlisted in 1862 in the 100th Indiana Infantry and served 15 months when he was discharged on account of ill health.  He participated in the siege of Vicksburg, and also of Jackson, Mississippi.  He married Helen Butler, a native of Vermont, born in 1837, a daughter of Daniel Butler.  They have five children -- Lester J., William E., Orla F., Nellie and Maud.