Correspondence and letter books, 1845-1889, of Charlemagne Tower, as well as legal and business papers related to real estate transactions, coal and iron lands in Pennsylvania, and the family affairs of the Tower family.

Correspondence, manuscripts of poems, and manuscripts of lectures by Benjamin. The correspondence consists of original letters of Benjamin, typescript and photostatic copies of Benjamin letters in other libraries, and letters to Benjamin from some of his literary contemporaries including Paul Hamilton Hayne, Willis Gaylord Clark, John Lothrop Motley, and Fitz-Greene Halleck. Many of the letters relate to Park Benjamin's lecture tours. There are other family letters and many documents relating to the Benjamin family,and two letterbooks of John Lothrop Motley. Also, a large amount of genealogical material of the Benjamin family, and its related families from the 16th century to the present day. There are also financial records, monographs, clippings, and photographs.

The Pierrepont family papers (1761-1918) document the intersection of commercial, civic and personal interests across three generations of one of the most prominent and influential families of nineteenth century Brooklyn, New York. The bulk of the collection concerns the business dealings of Henry Evelyn Pierrepont from 1838 to his death in 1888. This especially includes an extensive set of accounting and transactional records concerning the Pierrepont Stores, the family's warehouse on Brooklyn's East River waterfront; these include records of ships arriving at the Stores and their cargoes delivered. Additionally, there are substantive correspondence, legal documents and other materials concerning the Union Ferry Company, of which Henry was an officer. In addition to commerce and shipping, a major theme of the collection is that of land acquisition in Brooklyn Heights and at the adjacent waterfront in the early nineteenth century, and the development of that property over the course of the century. Included in the collection are correspondence, deeds, indentures, leases, accounting records, diaries, maps, invoices, receipts, business proposals, legal filings, clippings, and historical and genealogical manuscripts.