Letter from Klaus Fuchs, on a paper 'The production of mesons by electrons' by I N Sneddon and B F Touschek to D C Martin, Assistant Secretary of the Royal Society Apologises for holding the paper for so long, as it arrives when he was on holiday and has been ill upon return. He hasn't been able to look at the revised paper carefully but it is improved and now suitable for publication. [Published in Proceedings of the Royal Society A, 1949]. Endorsed on recto as received 7 July 1949. 6 July 1949