John Williamson Nevin (1803-1886) was a leading nineteenth-century Reformed theologian. Originally trained in the Presbyterian Church, he took up a teaching post at Mercersburg Seminary of the German Reformed Church in 1841, and spent the rest of his life teaching and writing in that denomination. Charles Hodge (1797-1878) was the premier American Presbyterian theologian of his era. Through his fifty-year tenure at Princeton Seminary, his editorship of the Biblical Repertory and Princeton Review, his three-volume Systematic Theology, and a host of books and articles, he exerted a decisive infl...