Complex sentence: Bishop Thomas Claggett ordained him a deacon in Prince George's County on December 3,1803, and after his ordination as priest, he became rector of Stepney Parish then in Somerset County, Maryland.
Split into simpler sentences: Bishop Thomas Claggett ordained him a deacon in Prince George's County on December 3,1803. After his ordination as priest, Kemp became rector of Stepney Parish then in Somerset County, Maryland.