Early Leaders of the Church ID: 434 | This file appears in: Saint Mark's Episcopal Church, 16 Thomas Street Image from a pamphlet about the history of St. Mark's. Depicted are early leaders of the church including the first Rector, Joseph Seabrook and Richard DeReef and William Pencille. Seabook was unanimously elected to rector in 1865. Richard DeReef was a member of the Brown Fellowship society. Courtesy of the Avery Research Center for African American History and Culture. Download Original File "Early Leaders of the Church" appears in: Saint Mark's Episcopal Church, 16 Thomas Street