Copy letter from Herbert Rix, to William Henry Preece, Fellow of the Royal Society, Engineer's Department, General Post Office, E.C. 'Dear Sir, In answer to yours of the 18th June, I now inclose Postal Orders for 11/-, together with your various documents and a receipt form, which I shall be glad if you will sign and return to me at your convenience. I am, yours truly, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 2 July 1894