Contains internal files for Lanman & Kemp, including shipping documents, checks and bills of exchange, company inventories, banking and account books, and miscellaneous items. Also included are correspondence of Rear Admiral Joseph Lanman, brother of David T. Lanman, and records of Edward Kemp's role as treasurer of the Episcopal Church of St. Peter's in Galilee in Monmouth Beach, New Jersey, which was located near his county estate at Rumson.

There are also two folders of photocopied reference material, left by previous researchers, that might be of interest to scholars of stamps, military history, or the California gold rush.