Scientific Correspondence between David J. Thouless and Others, 1970-1971 Contains the following correspondence, some of which are photocopies: Correspondence to and from Professor Charles G. Kuper, concerning contour integration method - dated 9 January to 13 February 1970. Correspondence to and from Professor S.F. Edwards, concerning exponential spin-wave tail workings - dated 9 January to 16 February 1970. Correspondence to and from Dr. R. Jones, concerning nonzero conductivity with manuscript calculations - dated 13 January to 20 January 1970. Correspondence to and from Professor Sir Nevill Mott, concerning preprints and papers on Ising and Heisenberg models - dated 13 January to 20 January to 2 August 1971. Correspondence to and from Professor B.R. Mottelson, concerning numerical calculations - dated 28 April to 8 May 1970. Correspondence to 'Judit' concerning the Siemens business - dated 26 June 1970. Correspondence to and from Professor Ravenhall concerning oscillations - dated 27 January to 15 August 1970 - with copy of 'Electronic Structure of Clean Metallic Interfaces' by C.B. Duke. Correspondence from Phil Siemens concerning Thouless' paper with Thorpe - dated 16 September 1970. Correspondence from Morrel H. Cohen concerning perturbation theory - dated 17 September 1970. Correspondence with Dr. Robert Borland concerning programming matrix and Jacobi routine - dated 22 October to 2 December 1970. Correspondence to Dr. de Llano concerning nuclear matter and particle theory - dated 31 March 1971. Two photocopies of correspondence sent to Professor P.W. Anderson concerning disordered lattice problem - dated 19 May to 2 June 1971. Correspondence to and from Dr. Michael A. Ball concerning analytical properties of the density of states - dated 24 May to 28 May 1971. Correspondence from Sidney Kahana concerning travel arrangements - dated 2 June 1971. Correspondence to and from Scott Kirkpatrick concerning a preliminary report - dated 2 October to 15 October 1971. Correspondence to Dr. Ishii concerning a paper on localization and transport in one-dimensional systems - dated 12 October 1971. Correspondence to and from Dr. Tom Lukes, concerning dispersion relation for one-dimensional systems - dated November 1971. Correspondence to and from Professor Robert Brout - dated November 1971. January 1970-November 1971