Referring to your letter of June 16 enclosing a cheque for £3. 3. 0, Dr Whitehead's subscription to the Royal Society for the current year, I would point out that the amount of the annual contribution is three pounds, not three guineas.
I enclose the cheque and will ask you to be good enough to alter the cheque to the lower amount, initial the alternations, and return the draft to me. It can then be paid into our bank.'