Copy letter from Herbert Rix, to Andrew Ainslie Common, Fellow of the Royal Society 'Dear Sir, The Soirée Committee are desirous of having an exhibit of Isaac Roberts' photographs at our Soirée on May 8; can you give me any information as to whom I should communicate with, on the subject. Yrs [yours] faithly [faithfully] H Rix Asst Sec [Herbert Rix, Assistant Secretary]'. 4 April 1889