Copy letter from an unknown correspondent, to Gilbert Thomas Walker, [Fellow of the Royal Society] Regarding Walker's paper 'On Boomerangs', the author suggests Walker add a footnote or a short postscript, giving a fuller reference to the experiments or other proofs which led him, as on page four, to represent the resistance to each element by a couple, as well as a force. The Committee think such an explanation would make the paper more useful to its readers. 31 May 1897