Letter from [William Dickson] Lang to [Archibald Vivian] Hill, regarding a paper 'The phylogeny of the ammonite family Liparoceratidae' by [Leonard Frank] Spath Paper reference code: B.117 Apologises for delay in replying. Regrets to ask to withdraw the paper. Asks whether Referee C [Herbert Leader Hawkins] would be willing to have a discussion about the comments. Argues that Referee B [Ernest William MacBride] 'has failed to understand the point'. [Not published]. Received 6 May 1937 5 May 1937