Collection
- Papers of the Low Moor Iron Company 1873-19271
- Papers of the Randolph Family of Edgehill, 1732/18602
- Paul G. Caplan Papers, 1890/20041
- Paul Stevens map collection, 1541/17781
- Penny C. Morrill Collection (MS104), 1970/19801
- Performing arts manuscripts collection, 1475/19843
- Peter family papers, 1722/193235
- Powell Family papers, 1775/19291