Includes a letter from P.J. Landin, 22 January, on data structures, correspondence with C.S.L. Atkinson regarding use of BCPL for Code Generator for the ICT 1900, carbons of Strachey's letters to accompany copies of his Copenhagen lectures, 'Fundamental Concepts in Programming Languages' (see MS. Eng. misc. b. 292/F.40-MS. Eng. misc. b. 292/F.54), and a letter to L. Goldthorpe, 3 November, describing plans for implementation of CPL and BCPL.