University of Pittsburgh Library System

The Darlingtons were prominent members of Pittsburgh society and avid collectors of Americana. William Darlington, an attorney, began the collecting of maps, books, and other documents; his children continued the practice until 1918 when Edith Darlington Ammon and her sister Mary O'Hara Darlington made the first donation of 11,000 volumes to the University of Pittsburgh. A second donation of material followed in 1925.

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