Copy letter from Robert William Frederick Harrison to Dr Charles Chree FRS, Old Deer Park, Richmond, Surrey 'Dear Dr Chree, I have to acknowledge your letter of the 28th inst[ant] with reference to the dates of the proposed Antarctic term tours, and I note that they have been checked by Prof [Arthur] Schuster, and find suitably situated relative to the terms of full moon. I am therefore having the letters written to the various controllers of Observatories, according to the list you have sent me.' 30 June 1910