"Pittsburgh (Pa.)" . . . . . . . . . . . . . . . . . "Papers include correspondence, receipts, accounts, and deeds relating to the family's vast land holdings in Pennsylvania, Ohio, and Illinois, as well as correspondence, contracts, accounts and agreements pertaining to James O'Hara's activities as Quartermaster General of the United States and industrial leader of Pittsburgh."@en . . . . . . . . . . . . . . . . . . . "History"@en . . . . . . . . . . . . . . . . . . "1600 - 1775" . . . . "O'Hara Glass Works (Pittsburgh, Pa.)" . .