Description and travel History 185 Social life and customs 114 Manners and customs 89 Indians of North America 85 Travel 60 Discovery and exploration 45 more ... Discoveries in geography 39 Gold mines and mining 30 Gold discoveries 28 Natural history 27 Politics and government 27 Overland journeys to the Pacific 23 Economic conditions 20 Antiquities 19 Slavery 19 Frontier and pioneer life 18 Indians of South America 18 Social conditions 18 Mayas 13 Civilization 12 Voyages and travels 12 Voyages to the Pacific coast 12 Missions 10 Fur trade 9 Pioneers 9 Agriculture 8 Emigration and immigration 8 Geology 8 Historic buildings 8 less ...