History 338 Railroads 278 Roads 227 Description and travel 89 Streets 59 Genealogy 44 Finance 39 more ... Canals 36 Histoire 35 Biography 32 Design and construction 32 Cemeteries 31 African Americans 30 Church records and registers 30 Antiquities 26 Transportation 26 Church history 25 Politics and government 23 Excavations (Archaeology) 22 Early works to 1850 19 Toll roads 18 History, Local 17 Indians of North America 17 Social conditions 17 Social life and customs 17 Surveying 17 Race relations 16 Slavery 16 Historic buildings 15 Maps 15 Routes 15 Anniversaries, etc 14 Buildings, structures, etc 14 Coal 14 Almanacs, American 13 Commerce 13 Episcopalians 13 Sermons, American 13 Lent 12 Registers of births, etc 12 less ...