Correspondence, memoranda, journals, writings, printed matter, maps, photographs, and other papers assembled during Capek's research on the immigration, organization, institutions, and activities of Czech Americans. Also includes material concerning Czechoslovakia, Czechs in Great Britain, Slavic Americans, and Slovak Americans. Includes newspapers and periodicals published by Czech Americans or by Czechs in Europe; biographical material on Augustine Herrman, T.G. Masaryk, Charlotta G. Masaryková, and Frederick Philipse; genealogical material on the Capek family and other families; and journals and other papers of a group of Czech Americans who attempted to establish a utopian colony in Russia in the mid-nineteenth century. Individuals represented include Thomas F. Bayard, Bartoš Bittner, Jan Borecký, Josef Buňata, Anna Vostroveský Capek, Thomas Capek (b. 1895), Christina Jonáš, Frederic Jonáš, Karel Jonáš, František Matouš (Ladimír) Klácel, František Kořízek, Henry R. Maresh, Stephen C. Massoch, Lev J. Palda, Jan Rosický, Rose Rosický, and Vaclav Snajdr.