Copy letter from Robert William Frederick Harrison, to W Geoffrey Duffield, Physical Laboratories, the University, Manchester 'Deat Sir, Mackinnon Studentship With reference to your letter of November 2nd, I now enclose two cheques of £75 each, respectively the second instalment of the 1st year's grant, and first instalment of the 2nd year's grant; Mackinnon Studentship. Kindly return the accompanying receipt. I am, faithfully yours, Robt [Robert] Harrison Assistant Secretary R.S. [Royal Society]'. 12 November 1907