Letter from Thomas Gold to Mr Ian Roxburgh, Department of Applied Mathematics, Queen Mary College, University fo London, Mile End Road, London E14NS, England Would be willing to do as Roxburgh says, provided the book is respectable. Gold could write an introduction for it, after seeing the manuscript, or a substantial part of it. He will assume that a suitable fee would be worked out, and that it will still be worth the paper it is printed on when the time comes. Asks if his colleague Percival is a man who once supervised a rather incompetent engineering student by the name of T. Gold in Cambridge. 4 February 1975