1. Fletcher to Ladd, p. 6; Moorehead, The Traitors, pp. 94–5.
2. Rhodes, Making of the Atomic Bomb, pp. 365–7.
3. Leslie Groves, Now It Can Be Told: The Story of the Manhattan Project (New York, 1962; repr. New York, 1983), pp. 3–18; Leland Johnson and Daniel Schaffer, Oak Ridge National Laboratory: The First Fifty Years (Knoxville, 1994), pp. 1–27; Michele Stenehjem Gerber, On the Home Front: The Cold War Legacy of the Hanford Nuclear Site, 3rd edn (Lincoln, 2007), pp. 31–6.
4. Gowing, Britain and Atomic Energy, p. 240; Peierls, Bird of Passage, p. 184; Szasz, British Scientists, p. 16.
5. Sanders, p. 307.