According to Patricia Lynn Garrett Iverson (http://familytreemaker.genealogy.com/users/i/v/e/Patricia-Garrett-I...), Thomas Harris McCall was born 1744 in PA, the son of James McCall and Janet Harris. Thomas married Jane Harris about 1770. At college, he changed the spelling of his last name to McCaule. He was pastor of the Independent Presbyterian Church in Savannah, GA. circa 1794.
Also I found this: "He was a chaplain in Revolutionary forces, according to "Schenk's History of North Carolina." In 1791 he taught school at Mt. Zion School, Winnsboro, South Carolina. He established a classical school in Savannah. He was pastor of the Independent Presbyterian church there in 1794. He was remarried March 8, 1796 to Eliza H. Montfort, widow of Robert Montfort of Savannah. He died later that year." (site: http://familytreemaker.genealogy.com/users/s/m/i/Clayton-Smith-Aike...)