Copy letter from Robert William Frederick Harrison to Professor J [John] B [Bretland] Farmer, Fellow of the Royal Society 'Dear Prof[essor] Farmer, At a recent meeting of the Exhibits Committee your offer to make up a microscopical exhibit for the Soiree, if required, was mentioned. Since your offer was made, the programme has been considerably extended, and in view of this the Committee think that they need not put you to the trouble of arranging an exhibit.' 2 May 1908