Gold mines and mining Gold discoveries 112 History 43 Description and travel 40 Overland journeys to the Pacific 22 Frontier and pioneer life 19 Voyages to the Pacific coast 16 more ... Pioneers 6 Social aspects 6 Economic conditions 5 Slavery 5 Manners and customs 4 Social life and customs 4 Chinese 3 Emigration and immigration 3 Gold miners 3 Indians of North America 3 Social conditions 3 Women pioneers 3 African Americans 2 Americans 2 Art, American 2 Commerce 2 Economic history 2 Foreign relations 2 Gold mines and mining in art 2 Indians, Treatment of 2 Labor 2 Mexican War, 1846-1848 2 Mining camps 2 less ...