Copy letter from Theodore E James, to Major Waller, London Electric Supply Corporation 'Dear Sir, In reference to your letter of yesterday's date, I may mention that the Royal Society has for a considerable period used electricity, supplying at the same time certain other parts of the building from its own engine and dynamo. Yrs [Yours] faithfully, T E James Clerk, R.S. [Royal Society]'. 25 August 1891