Jones, Horatio Gates. 1858. The Levering family, or, A genealogical account of Wigard Levering and Gerhard Levering, two of the pioneer settlers of Roxborough township, Philadelphia county ... and their descendants; and an appendix, containing brief sketches of Roxborough and Manayunk. Philadelphia: Printed for the author, by King & Baird. [Detached boards], 1858, Shelf: 1. Books and Bound Manuscripts, FP.2016.004. Fairmount Park Historic Resources Archive. https://pprarchives.libraryhost.com/repositories/2/archival_objects/13727 Accessed April 20, 2025.