History 331 Antiquities 72 Excavations (Archaeology) 56 Politics and government 50 Registers of births, etc 42 Sources 37 Histoire 36 more ... Swedes 35 Biography 34 Description and travel 30 Indians of North America 30 Church records and registers 29 Genealogy 25 Boundaries 24 Probate records 23 Church history 21 Indexes 21 African Americans 17 Archaeology 17 Families 17 Historic buildings 17 Quakers 17 Wills 17 Education 15 Delaware 14 Archives 13 Canals 13 Lawyers 13 Swedish Americans 13 Historic sites 12 Agriculture 11 Churches 11 Episcopal 11 Railroad companies 11 Taxation 11 Economic conditions 10 Finns 10 Law 10 Lutheran Church 10 Miscellaneous records 10 less ...