Copy letter from Robert William Frederick Harrison, to Miss Nora Murphy, Liverpool School of Tropical Medicine, Johnston Tropical Laboratory, The University, Liverpool Sending a copy of Dr Yorke's paper, in answer to her request. 100 copies have been ordered for the author and should be in his hands. She will of course acknowledge it as having been read before the Royal Society and reprinted from 'Proceedings [of the Royal Society]'. All this was settled with Major [Ronald] Ross, some time ago. 4 February 1911