The following data is extracted from Genealogy and Biography of Ontario County, New York.
(III) William, son of David and Dorothy (Turnbull) Beattie, was born on the family homestead, December 16, 1830, and died there, January 14, 1893. He was engaged in farming throughout the active years of his life, and for many years served as a trustee of the Presbyterian church, of which he and his wife were devout members. He married, June 9, 1858, Mary E. Barnes, who was born in Yates county, New York, January 22, 1827, and died May 10, 1900.
Source: Genealogy and Biography of Ontario County, New York