Materials in this section of the exhibit are pulled from the Darlington Family Papers.

The Darlington family lived in Pittsburgh, Pennsylvania, from the late eighteenth through the early nineteenth centuries. William M. Darlington and his wife, Mary Carson O'Hara Darlington, collected thousands of books and manuscripts documenting the frontier history of western Pennsylvania. The collection includes financial, personal and legal papers, and documentation of collecting activities and ephemera related to William M. Darlington and his family. Formats of the materials include ledger books, research notes, manuscripts, personal diaries, photographic prints and negatives, letters, and artwork.