Yancey's widowed mother married the Reverend Nathan Sydney Smith Beman on April 23, 1821. Beman had temporarily relocated to South Carolina to operate Mt. Zion Academy, where William was a student. In the spring of 1823, the entire family moved when Reverend Beman took a position at the First Presbyterian Church in Troy, New York. Beman worked with Reverend Charles G. Finney in the free school movement and became involved with abolitionism in the 1830s through contacts with Theodore Dwight Ward and Lyman Beecher.