The Alger family joined the church in 1830. Their daughter Fanny was 14 at the time. In 1836, the Algers left Kirtland. Joseph asked Fanny’s uncle, Levi Hancock, to take her to Missouri with the Saints, but Fanny chose to follow her parents instead. She soon married a grocer named Solomon Custer in Indiana and bore nine children. That is what we know reliably about the Alger family. What happened between 1830 and 1836 is, unfortunately, shrouded in mystery and innuendo. See Richard L. Bushman, Joseph Smith: Rough Stone Rolling at 323 — 7 (Vintage Books, 2007).