Slavery 88 History 61 Description and travel 40 Slave trade 37 Slaves 35 Emancipation 31 Colonies 26 more ... Antislavery movements 20 Commerce 18 Sugar trade 17 Commerce--West Indies--18th century 13 Merchants--Pennsylvania--Philadelphia--18th century 13 Slavery in the West Indies 13 Sources 13 West Indies--Commerce 12 Social conditions 10 Controversial literature 8 Slavery and the church 8 Trade--West Indies--18th century 8 Emigration and immigration 7 Gazetteers 7 Genealogy 7 Blacks 6 Pirates 6 Abolitionists 5 Economic conditions 5 Law and legislation 5 Shipping--Pennsylvania--Philadelphia--18th century 5 Shipping--West Indies--18th century 5 African Americans 4 British 4 British Americans 4 Buccaneers 4 Commercial policy 4 History, Naval 4 International trade--18th century 4 Merchants--Pennsylvania--Philadelphia--19th century 4 Missions 4 Naval operations 4 Politics and government 4 less ...