Copy letter from Robert William Frederick Harrison to Dr S [Sydney Arthur] M [Monckton] Copeman FRS, Local Government Board, Whitehall, SW 'Dear Dr Copeman, The enclosed paper by Prof G Dreyer and Mr William Ray has been communicated to the Proceedings [of the Royal Society], but as its length is estimated at considerably more than is usually accepted for Proceedings, the Secretaries are of opinion that it should be considered as for the Philosophical Transactions [of the Royal Society]. If you concur, and are willing to report on the paper, will you be good enough to make your report on the accompanying form?' 6 May 1910