Scientific Correspondence between David J. Thouless and Others, 1974-1978 Contains the following correspondence, with some loose manuscript notes, computer printouts and calculations: Correspondence to and from Sir Rudolf Peierls concerning Thouless' work - dated 13 February 1974. Correspondence sent to 'Paul' concerning lecture preparation on hopping conductivity - dated 22 March 1974. Correspondence sent to Dr. A. Mookerjee with calculations from numerical results - dated 7 August 1974. Correspondence to and from Professor Sir Nevill Mott concerning calculations of the density of states for the Anderson model - dated 10 September to 30 November 1977. Correspondence sent to Yuval Gefen concerning a postdoctoral position at the University of Cambridge - dated 12 November 1984. Short correspondence from Professor W.F. Viven concerning a reply to a referee, forwarded to Thouless on 8 April 1975. Correspondence to and from J. des Cloizeaux concerning criticisms and references - dated May 1975. Correspondence from Dr. Abhijit Mookerjee, concerning the 'degree of localisation' and Anderson and Thouless' localization criterion - dated 14 August 1975. Correspondence to and from A. Kumar concerning Kumar's paper on solid state communications - dated September 1975. Correspondence to and from Professor N.E. Cusack concerning a review article on localization for Physics reports - dated 23 October to 21 November 1975. Short correspondence to and from Professor Michael W. Klein concerning a preprint of Thouless' work - dated January 1976. A series of correspondence addressed to 'Phil, Scott, Richard and David' [Anderson, Lieb, Palmer and Thouless] - dated January 1976. Correspondence to Professer Domb, concerning spin glass conditions and preprinted material - dated 30 January to 3 February 1976. Correspondence to 'Phil, Elliott and Richard' dated 9 February 1976. Correspondence to and from Dr. D. Sherrington concerning double mean field argument - dated 12 February 1976. Correspondence to and from P.W. Anderson concerning Thouless' work and Sherrington-Kirkpatrick solution - dated 17 February 1976. Correspondence to and from Dr. Young concerning renormalization and spin glass - dated 9 June to 13 July 1976. Correspondence sent to Dr. Don C. Licciardello concerning the Lanczos method - dated 19 October 1976 to February to 18 April 1977. Correspondence to and from Dennis Weaire concerning calculations and reprinted works - dated 21 June 1976 to February 1977. Correspondence to and from Dr Rowlands concerning calculations and an algebraic mistake - dated February 1977. Correspondence sent to Dr Binder of Fachrichtung-Physik University concerning how to identify vortices automatically in the x-y model - dated 11 March 1977. Correspondence sent to Dr. Fowler concerning papers on one-dimensional spin systems - dated 16 November 1978. February 1974-November 1978