I have to acknowledge your letter of yesterday, and enclose a Postal Order for 10/6 for one year's rent of Call Box from the 13th ultimo. I shall be obliged if you will accept notice now to terminate the agreement with regard to the Call Box at the end of the current year.
I am, faithfully yours,
Robt [Robert] Harrison
Asst. [Assistant] Secretary, R.S. [Royal Society]'.