Scope and Contents Ledger, 1865-1868, of accounts of unknown merchant in Caernarvon township, Pa., used as index and file for correspondence, 1882-1899, of physician D. Heber Plank. Correspondence file contains incoming letters and drafts of outgoing letters concerning family genealogical research; analyses of manganese ore found by Plank in Bucks County; notes on medical cases; Plank’s application as examining physician for local pension board; and personal financial and estate matters. Includes correspondence...