Scientific Correspondence between David J. Thouless and Others, 1965-1970 Contains the following correspondence: Correspondence sent to Sir Robert Aitkin, concerning the University of Cambridge's Mathematical Physics Department - dated 4 March 1965. Correspondence from Charles Kuper, concerning their article on causality and tachyons - dated 7 September 1969. Correspondence to and from Professor John M. Ziman, concerning energy levels of a random lattice with calculations, Watson's multiple scattering theory, - dated 23 September 1969 to 6 November 1969. Correspondence to and from Freeman Dyson, concerning the 1-D Ising model with inverse-square interaction - dated 5 November 1969 to 26 November 1969. Correspondence to and from Dr. Volker Heine, concerning 'true-exchange effect' - dated 23 December to 31 December 1969. Correspondence sent to Professor Phil W. Anderson, concerning Anderson's paper on 'Absence of Difussion' - dated 13 January 1970. March 1965-January 1970