Research notes, transcripts of interviews with Steffanson, correspondence, clippings, and other biographical materials deals with all aspects of Steffanson's life including his early career in America after 1909, the Swedish and Canadian paper, wood pulp, and cellulose industries, cultural and social life and New York real estate in the 1920's, his excape from the "Titanic" in 1912, and genealogical notes on the family of his wife, Mary Pinchot Eno.