Histoire 2 History 2 Maps--North America--18th century 2 Cartography 1 Climat 1 Climate 1 Climatology 1 more ... Description and travel 1 Descriptions et voyages 1 Découverte et exploration espagnoles 1 Discoveries in geography 1 Discovery and exploration 1 Disease 1 Diseases 1 Forts--18th century 1 Geological Phenomena 1 Indian Territories--18th century 1 Indians of North America 1 Land Surveys--18th century 1 Maladies 1 Maps 1 Meteorology 1 Météorologie 1 Native Americans--White perceptions of 1 Railroads 1 Spanish 1 Travel 1 United States--History--Westward Expansion--18th century 1 United States--Western Frontier--Descriptions--18th century 1 climate 1 disease 1 illness 1 less ...