Herman W. Hellman (1843–1906), Marco H. Hellman (1878–1948). Historically Significant Archive of Two Generations of Los Angeles Bankers, Including Herman W. Hellman’s Letterbook of His Correspondence for Three and a Half Years with Over 800 Letters, 1,045 Original Photographs, Five Original Works of Art, Two Scrapbooks, Covering an Extensive Period in Marco’s Life, Over 90 Letters and Notes to Marco and His Family, Two Handwritten Diaries by Rita Laura Hellman (Levis) (1884–1920), as well as More than 30 Printed and Handwritten Pieces of Ephemera.