Poultney Church records indicate Oliver Cowdery's half-sisters were baptized into the church.
Entry, August 2, 1818, Poultney Church Records, Book 3, Poultney, Vermont, Poultney Historical Society, in Wesley Preston Walters Manuscript Collection, Box 55, PCA Historical Center, St. Louis, Missouri
Mr. Cowdrey's children were baptized by Rev. Mr. Hall viz Rebeka Maria, Lucy and Phebe on the faith of their mother.
Also reproduced in Wesley P. Walters, The Use of the Old Testament in the Book of Mormon (Salt Lake City: Utah Lighthouse Ministry, 1990), 213