Copy letter from an unknown correspondent, to Messrs Waterlow & Sons, Finsbury Stationery Works, E.C. The correspondent accepts the estimate of £4-7-0 for the two plates separately printed as per enclosed [not attached]. Asks for the items to be printed at once and the whole number of the 'Proceedings [of the Royal Society]' is now printed and only waits the plates. 11 February 1890