American Memory provides free and open access through the Internet to written and spoken words, sound recordings, still and moving images, prints, maps, and sheet music that document the American experience.
Documenting the American South (DocSouth) includes twelve thematic collections of primary sources for the study of southern history, literature, and culture.
Free digital collections, including Asian art, maps, Civil War era collections, college sheet music, WWII posters, Eisenhower correspondence, New England Loyal Publication Society.
Immigration to the United States, 1789-1930, is a web-based collection of selected historical materials from Harvard's libraries, archives, and museums that documents voluntary immigration to the US from 1789 until the onset of the Great Depression.
The years 1846-1869 are significant, representing the Mormon exodus from Nauvoo, Illinois, the joining of the Union Pacific and Central Pacific railroads at Promontory Point, Utah, and the ending of the overland pioneer era.