Copy letter from Sir William Bate Hardy, FRS, Secretary of the Royal Society; to Dr FG [Sir Frederick Gowland] Hopkins, FRS Communicating the comments about Onslow's paper Sir William Bate Hardy, FRS, has previously spoken to Dr FG [Sir Frederick Gowland] Hopkins, FRS, about, and according to which the Zoology Committee would like the author to consider amending the paper. The comments advise that most of the historical introduction could be removed, the description of the original work shortened, and the work be arranged to give clear instances of possible causes of colour. 2 February 1920