Copy letter from Robert William Frederick Harrison, to Dr Richard Tetley Glazebrook, Fellow of the Royal Society 'Dear Dr Glazebrook, I enclose a cheque for £2. 18s. 3d income tax recovered in respect of the National Physical Laboratory Pension Fund a/c [account] and payable to that account. Kindly send me a receipt in due course. I am, faithfully yours, Robt [Robert] Harrison Assistant Secretary R.S. [Royal Society]'. 12 November 1907