Composed mainly of correspondence between Einstein and his executor, Otto Nathan. A number of letters discuss the fate of Jews in Europe and other aspects of World War II. Others deal with Brandeis University, Jewish affairs in the United States, and personal matters. There are also letters from Elsa Einstein to Nathan, and letters to Albert Einstein from Sigmund Freud, Felix Frankfurter, Charles Beard, and others. The collection includes some manuscripts, ephemera and photographs of Einstein.