Family life--Personal correspondence--20th century 2 Insurance companies--United States 2 African Americans--History--Negro Education--Late 19th Century 1 Armenia--History 1 Centennial Exhibition (1876 : Philadelphia, Pa.) 1 Charitable organizations--Pennsylvania--Delaware County 1 Charities--Pennsylvania--Philadelphia 1 more ... Civil rights movements 1 Coal Industry--19th century 1 Coal Industry--20th century 1 Coal mines and mining--Pennsylvania 1 Coal mines and mining--West Virginia--20th century 1 College trustees--United States 1 Deeds--17th century 1 Deeds--18th Century 1 Deeds--19th century 1 Deeds--New Jersey 1 Department stores--Pennsylvania--Philadelphia 1 Depressions--1929--Pennsylvania--Philadelphia 1 Discrimination in housing 1 Dreer, Ferdinand J. (Ferdinand Julius), 1812-1902 1 Family life--Pennsylvania--20th century 1 Family life--Personal correspondence--19th century 1 Family life--Upper Class--Philadelphia--19th and 20th centuries 1 Farm management--Bills--20th Century 1 Farming--Pennsylvania--20th century 1 Fire insurance 1 Forests and forestry 1 Genealogical correspondence 1 Genealogy--Family trees 1 Hotels--Pennsylvania--Philadelphia 1 Housing development--United States 1 Indian Rights Association 1 Insurance policies 1 Jews, American 1 Mortgage banks--United States 1 Motion picture theaters--Pennsylvania--Philadelphia--1920-1940 1 Newspapers--Pennsylvania--Philadelphia 1 Newspapers--Pennsylvania--Philadelphia--20th century 1 Nonprofit organizations--Pennsylvania--Delaware County 1 less ...