Correspondence of Henry Harris regarding the 50th anniversary of the Dunn School, plus research into Dunn School history, preparations for the celebration symposium, and texts of lectures by Harris, Medawar, Gardner, Heatley, Abraham and Mackaness plus the Chairman's introduction and an audio recording list. Includes a letter from Violet Gardner replying to a condolence letter from Harris on the death of her husband, A.D. Gardner [died 28 Jan 1978].