Heywood & Company Ltd. Letters between H F Onley, Managing Editor of the Book Department, Heywood & Company Ltd., and Penrose regarding the possibility of Penrose writing a book on his self-reproducing models. Penrose agrees to a meeting, but suggests he has no time at present to write a book. Also contains a letter from Penrose to L F Hammond advising Onley would be interested in seeing his work with a view to publication. Nov 1961 - Dec 1961