American History, 1493-1945 This link opens in a new window- This link opens in a new window
The Gilder Lehrman Institute of American History’s archive of letters, diaries, maps pamphlets, printed books, newspapers, and ephemera sheds light on the political, economic, and social history of the United States up until the 20th century. The majority of the collection is unique manuscripts, with special emphasis on the revolutionary, early national, antebellum, and civil war eras.