Letter from F Hoffer [?], Ministry of Supply, regarding three papers 'Molecular structure and rubber-like elasticity I. The crystal structures of ß gutta-percha, rubber and polychloroprene', 'Molecular structure and rubber-like elasticity II. The stereochemistry of chain polymers' and 'Molecular structure and rubber-like elasticity - III. Molecular movements in rubber-like polymers' by Charles William Bunn Sectional Committee: Chemistry Replies to letter as requested by Herbert John Gough, and encloses manuscript. The paper contains nothing of value to the enemy, there is no objection to publication. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on recto as received 27 June 1941. 25 June 1941