This book begins with the text of an initial essay sent by the author to the late Professor P.T. Geach, his former doctoral supervisor (1976-79, Leeds), in 1980, along with the latter's extensive marginal comment. There follows the main section, comprising the correspondence. The book includes the author's correspondence, plus Peter Geach's replies over a thirty-year period (1981-2010), including the author's italicised and bracketed comments, often extensive, on Geach's replies. A final section discusses the Anscombe-C.S. Lewis controversy (Oxford 1947). It finds that Geach appears implicitly (citing J.B.S. Haldane from the The Rationalist Annual of the 1930s) to support rather a version of the Lewis thesis (that thought as open to truth cannot fairly be simply judged to have materially "evolved", whatever degree of "bewitchment by language" it regularly suffers) than Anscombe's contrary view at that time in his communications to the author.