The arrangement of the Arensberg Archives is based as much as possible on the original order of the records maintained by the Arensbergs and their assistants. The preliminary arrangement of the records was completed by Naomi Sawelson-Gorse, former archivist of the Francis Bacon Foundation, on an intermittent basis between 1986 and 1990, and included three series: Correspondence and Printed Material, Photographs, and Clippings. Her arrangement was based on first-hand information about how the Arensbergs maintained their records gained through the Arensbergs' long-time assistant and President of the Francis Bacon Foundation, Elizabeth Wrigley. The current arrangement adds four additional series--Art Collection, Writings, Personal Records, Elmer Ernest Southard--and makes Ephemera (i.e., Printed Material) a separate series. These changes were necessary to accommodate additional material received in 1996 as well as material transferred from the Department of Prints, Drawings and Photographs in 2001. A detailed description of each series and subordinate subseries follows.