History 35 Sources 16 Bibliography 10 Manuscripts, American 10 Archives 7 Manuscripts 7 Slavery 6 more ... Antislavery movements 4 Exhibitions 4 Indians of North America 4 African Americans 3 Archival resources 2 Constitutional history 2 Description and travel 2 Discovery and exploration 2 Dutch 2 Foreign public opinion, French 2 Government relations 2 Indians, Treatment of 2 Law 2 Mexican War, 1846-1848 2 Politics and government 2 Presidents 2 Reconstruction 2 Swedes 2 African American musicians 1 Agriculture 1 Anniversies, etc 1 Botanists 1 Botany 1 Catalogs 1 Catholics 1 Causes 1 Centennial celebrations, etc 1 Chandlee genealogy 1 Charities 1 Clock and watch makers 1 Clocks and watches 1 Commerce 1 Correspondence 1 less ...