Copy letter from Robert William Frederick Harrison, to Professor Halliburton, Fellow of the Royal Society Messrs Boyce and Warrington have now returned their paper on the Nervous System of the Bird amended in accordance with the recommendation of the Physiology Committee. Encloses a reply [not enclosed] from the author in relation to the recommendation of Dr Langley (one of the referees) that the illustrations should be reduced in size. 11 May 1899