Letter from Sidney Barrington Gates, on a paper 'On secondary circulation in fluid flow' by William Rede Hawthorne, to D C Martin, Assistant Secretary of the Royal Society Paper reference code: A123 Requests a second opinion on Hawthorne's paper before recommending it for publication, and enquires if he is authorised to send the paper to [Arthur] Fage. Written from Ash Vale, Aldershot [England]. [Published in Proceedings A, 1951]. Endorsed on recto as received 22 July 1950. 22 July 1950