Immigration to the United States 1789-1930"Immigration to the United States, 1789-1930, is a web-based collection of historical materials from Harvard's libraries, archives, and museums that documents voluntary immigration to the United States from the signing of the Constitution to the onset of the Great Depression. Concentrating heavily on the 19th century, Immigration to the US includes over 400,000 pages from more than 2,200 books, pamphlets, and serials, over 9,600 pages from manuscript and archival collections, and more than 7,800 photographs. "