History 258 Railroads 255 Roads 165 Description and travel 76 Streets 49 Canals 36 Histoire 34 more ... Finance 31 African Americans 26 Antiquities 26 Politics and government 23 Transportation 23 Excavations (Archaeology) 22 Genealogy 22 Cemeteries 20 Design and construction 19 Early works to 1850 19 Surveying 17 History, Local 16 Race relations 16 Toll roads 16 Coal 14 Slavery 14 Almanacs, American 13 Buildings, structures, etc 13 Commerce 13 Episcopalians 13 Historic buildings 13 Indians of North America 13 Sermons, American 13 Social conditions 13 Lent 12 Social life and customs 12 Antislavery movements 10 Architecture 10 Freight 10 Inscriptions 10 Location 10 Maintenance and repair 10 Maps 10 less ...