This collection consists of a variety of materials including correspondence, addresses, membership lists, sermons, writings, research materials, newsletters, clippings, playscripts, music scores, annual reports, planning documents, lecture and curriculum notes, manuscripts (literary). There are some biographical writings, including his publication, The Automobile as Icon: autobiographical reflections (1986). Interspersed within are audio cassettes of sermons and lectures, reel-to-reel tapes, some microfilm, and photographs. There is a collection of original diaries and correspondence of John Frederick Hanson that provided research for Dr. Roberts' article about Hanson. There is also an extensive collection of copied materials from original documents relating to the Friends in Alaska, used by Dr. Roberts in preparation for his book, Tomorrow is Growing Old about Quakers in Alaska.