Scientific Correspondence between David J. Thouless and Others, 1967-1969 Contains mainly photocopies of the following correspondence: Correspondence to and from Gerald E. Brown; concerning density fluctuations in Landau theory - dated 8 April 1967. Correspondence to 'Lew' concerning variation of exchange with temperature and spin-lattice relaxation times - dated 20 May 1967 to 8 June 1967. Correspondence to 'Tom' concerning expression of free energy - dated 19 June 1967. Correspondence to and from Dr. G.W. Greenless concerning preprinted work - dated 21 May to 25 June 1968. Correspondence to and from Dr. Dietrich Stauffer; concerning preprint of Thouless' paper 'Flow in a dense superfluid' - dated 19 January 1968 to 4 February 1969. Correspondence from S.F. Edwards concerning a paper on Mott transition - dated 18 March to 12 June 1968. Correspondence from Dr. Volker Heine concerning comments regarding exchange and correlation - dated 3 January 1969. Correspondence to Dr. Glover, concerning critical temperature and heat - dated December 1968 to January 1969. Correspondence to Dr. Ferrell, concerning thickness of film - dated 13 December 1968 to January 1969. Correspondence to De Gennes concerning a previous calculation - dated 10 January 1969. Correspondence to and from Dr. W.R. Hering concerning Bethe and the Oppenheimer-Phillips argument - dated 17 January to 24 January 1969 - with copies of papers from Physics Letters Volume 26B Numbers 7 and 9. Correspondence to Dr. T. Kaplan concerning an approach to the Hartree-Fock theory - dated 24 March 1969. Correspondence to Professor H.A. Bethe concerning a model for rotational states - dated 26 March 1969 Correspondence to Dr. Ravenhall, concerning a collaborative paper - dated 7 May 1969. Correspondence to Dr. G. Sudarshan, concerning an article on tachyons in Physics Today - dated 20 May 1969. Correspondence to Dr. Halperin, concerning superconductivity thin film - dated 22 May 1969. Correspondence to and from Professor C. Domb, concerning work on the Ising model - dated 13 December 1968 to 27 May 1969. Correspondence from Professor Sir Nevill Mott, concerning Kubo-Greenwood formula - undated. Correspondence to Dr. M.A. Thorpe, concerning an expression for Region II - dated 9 June 1969. Correspondence from Freeman J. Dyson, concerning a publication of Thouless in the Physical Review - dated _ to 18 November 1969. Correspondence to and from Alan B. Solinger, concerning a preprint from Nature on superliminal group velocities - dated 19 August to 25 November 1969. Correspondence to Professor John M. Ziman concerning multiple scattering formalism - dated 19 September to 27 November 1969. Correspondence to and from Dr. Charles G. Kuper, concerning 'Tachyon' preprints and the Bludman-Ruderman system - dated 10 October to 23 December 1969. April 1967-December 1969