Aston's research papers consist of four notebooks recording work on positive rays, 1911-1913, and a few unidentified manuscript calculations. His time at the Royal Aircraft Establishment, Farnborough is documented by reports on his work submitted to the Advisory Committee for Aeronautics, 1917-1919 and a humorous account of wartime activities at Farnborough by an unidentified author. Publications material consists of manuscript and typescript drafts of a small number of Aston's publications, illustrative material, off-prints by Aston, 1919-1939, and a number of typescripts of papers by other scientists including W.H. Bragg, O.J. Lodge and W.J. Pope. There are correspondence and papers, 1935-1945, relating to Aston's Presidency of the International Union of Chemistry's Commission on Atoms. The remaining correspondence consists of a chronological sequence relating to Aston's scientific work, 1914, 1922-1945, and n.d. The sequence is predominantly incoming with a few manuscript drafts by Aston, some on the verso of incoming letters. It provides some documentation of Aston's visits and conferences, especially a visit to the USA in 1922 to lecture at the Franklin Institute, Philadelphia, Pennsylvania.