Scientific Correspondence between David J. Thouless and Others, 1984-1985 Contains the following correspondence: Correspondence to and from Dr. A MacKinnon concerning preprints on the Cauchy distribution and pseudotopological disorder - dated 16 January 1964. Correspondence to and from Professor Roger Haydock concerning convergence of the recursion method and solving linear integral equations - dated 17 February 1984. Series of correspondence to and from Dr. J.L. van Hemmen concerning calculations and a Lyapunov exponent - dated 6 February to 1 March 1984. With further correspondence dated 4 July 1984 with accompanying diagrams and graphs. Correspondence to and from Dr. Yosi Avron concerning an equation on particle transport - dated 29 April to 16 May 1984. Correspondence to Yong-shi concerning a paper on canonical transformations - dated 18 June 1984. Correspondence to Dr. Bernard Derrida concerning perturbature treatment of weak disorder limit - dated 7 December 1984. A series of correspondence to and from Dr. Barry Simon concerning 'regularity properties of the density of states in random and almost-periodic tight-binding Hamiltonians' - dated January 1985. Correspondence to and from Drs. Zs. and M. Gulacsi concerning stability analyses of SK spin glass model - dated 25 March 1985. Correspondence to and from Victor M. Ratag concerning Cauchy distribution and the Bethe lattice - dated 17 April to 2 May 1985. Correspondence to and from Dr. Amal K. Das concerning 2D electron gas - dated 24 June to 4 July 1985. Correspondence to and from Dr. Zirnbauer concerning Bethe lattice and spin glass - dated 2 August to 4 December 1984. January 1984-November 1985