George Duffield was a Lancaster, PA clergyman. Duffield later moved to Carlisle where he preached for the majority of the next two decades. In 1820, he was elected to the Board of Trustees at Dickinson College where he served until the 1833 Methodist takeover. Duffield was instrumental in the 1837 split within the Presbyterian Church, authoring a controversial book entitled Duffield on Regeneration (1832). He spent the last thirty years of his life in Detroit, Michigan supporting the “New School” of the Presbyterian Church.