found: Andersen, H.C. The ice-maiden, 1863: t.p. (Frederick Leypoldt; New York publisher)
found: Appletons' cyclopaedia of Amer. biog., 1900 (Leypoldt, Frederick; bibliographer; publisher; author; b. 11/17/1835; d. 3/31/1884)
found: MWA/NAIP files (hdg.: Pylodet, L., 1835-1884; usage: L. Pylodet; F. Leypoldt)
found: RLIN, 07/21/95 (hdg.: Pylodet, L., 1835-1884; Leypoldt, Frederick, 1835-1884; Leypoldt, F. (Frederick) ---; note: used own name as publisher and editor; used Pylodet as author of French and German textbooks)