Letter from William Thomas Astbury, on two papers by Clement Henry Bamford, W E Hanby and F Happey, to the Assistant Secretary of the Royal Society [D C Martin] Paper reference code: A76-77 Astbury apologises for taking a long time with the papers that have been sent to him. Written at the Department of Biomolecular Structure, University of Leeds [England]. [Published in Proceedings A, 1951]. Endorsed on recto as received 6 July 1950. 5 July 1950