Letter from John Frank Allen, on a paper 'Superflow of helium II through compressed powder' by B S Chandrasekhar and Kurt Alfred Georg Mendelssohn, to D C Martin Paper reference code: A222 Allen writes in view of the second referees comments and Dr Mendelssohn's 'plea of continuity' he is willing to remove his objection to publication, though feels his 'criticism is entirely valid'. Written at Department of Natural Philosophy, The University, St Andres, Fife [Scotland]. [Published in Proceedings A, 1954]. Endorsed on recto as received 17 February 1953. 13 February 1953