Copy letter from Robert William Frederick Harrison, to Captain William de Wiveleslie Abney, Fellow of the Royal Society Referring to Abney's notification that 'Proceedings [of the Royal Society]' numbers 340 and 357 have not reached him, there does not seem to have been any omission on the part of the printers to post the numbers, but of course a considerable lapse of time has occurred since they were published. With a further trace Abney may perhaps find them. Number 340 costs three shillings, and 357, two shillings. 23 February 1897