Copy letter from Robert William Frederick Harrison to Professor H [Hugh] L [Longbourne] Callendar FRS 'In reply to your letter of the 4th instant, with reference to your report on Jenkin and Eye's paper, I feel sure the Committee would be willing to extend the time suggested in order that you may be enabled to make a full report on it, rather than lose your opinion on the matter. I was sorry to learn that you have been ill recently and trust that you are now quite recovered.' 5 February 1913