Copy letter from Robert William Frederick Harrison, to the Secretary, Office of Works and Public Buildings, 12, Whitehall Place, S.W. 'Sir, I have to acknowledge the receipt of your letter of B 980/98. yesterday's date relating to the safeguarding of the Kew Observatory, in view of the proposed adjacent Electric Tramway. I am, Sir, Your obedient Servant, Robt Harrison Assist. Sec. R.S. [Assistant Secretary of the Royal Society]'. 18 February 1898