The five generation of the Peirce family owned farmland in Kennet Square, Pennsylvania. Over time the family added recreational facilities and opened the land to the public as "Peirce's Park" now Longwood Gardens. This small collection consists of photocopies of correspondence related the genealogy of the Peirce family.

Sarah Dennen (1882-1970) was a descendant of G.W. Peirce, the original owner of Peirce's Park (now Longwood Gardens). The collection includes biographical notes and brief reminiscence of Peirce's Park in the late nineteenth century.