The letters form an original bundle attached to a note from Peter Burbidge of Cambridge University Press saying 'Returned with thanks'. The letters are from Aydin Sayili of Ankara, Turkey; P. O. Williams, Director of the Wellcome Trust, London; The Royal Society; Sung Chih-kuang, Chinese Ambassador, London; [?] of the Department of History, University of Chicago; D. M. Dunlop of Columbia University, New York City, U.S.A.; Laurence Picken of Jesus College, Cambridge; [?] of the Department of Classical Studies, The University of Michigan, U.S.A.; Jung-pang Lo of the University of California, Davis, U.S.A.