Josiah Baker, Sr. P. O., Slater. Known as the "Father of Slater," the son of Joseph and Mary Baker, was born, September 23, 1814, in Pickaway county, Ohio, from whence his parents, when he was only six years old, moved to Ross county, Ohio, where he was raised on a farm. ... his father, also a Baptist preacher, was a soldier in the war of 1812.