Copy letter from Robert William Frederick Harrison to Professor H [Herbert] H [Hall] Turner FRS 'With reference to you call yesterday afternoon, I find that out of our 45 Foreign Members (no 52 as you supposed) 23 have answered our invitations to the Celebrations and out of these only four have accepted them, namely; Prof J B A Chauveau, Prof G Mittag-Leffler, Prof I P Pawlow and Prof G H Quincke.' 1 May 1912