Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Sir Joseph John Thomson OM, FRS 'Replying to your letter of the 25th instant, I regret that it is not in my power to add your name to the signatories of Professor McLennan's certificate, as these certificates must be signed by Fellows in person. I will however have it ready for you to sign on Monday next, when you could if you wish order its re-suspension at the same time.' 27 November 1914