The papers are a mix of personal and professional correspondence, in part documenting Hans Albert's assistance to his brother Eduard, who exhibited symptoms of schizophrenia in 1930 and spent much of the rest of his life in a Swiss sanatorium, where he died in 1965. A substantial part of the collection relates to a book of Einstein Family letters proposed by Frieda Einstein, who assembled and edited correspondence from a number of family members under the working title Albert Einstein in His Letters to His Wife and Children. The book was not published. Box 2 folder 2 contains materials received from Elizabeth Einstein in 1990 and incorporated in part in her Reminiscences published by the The University of Iowa Institute of Hydraulic Research in 1991. The remaining materials, Box 1 folders 1-6 and Box 2 folder 1, were sent to the Hydraulic Institute by her estate's executor in 1995 and later transferred to the Libraries. The materials are in German unless otherwise indicated.