Copy letter from Robert William Frederick Harrison, to M le Dr Alphonse Berget, 16 Rue de Vaugirard, Paris 'Monsieur le Baron, I have the pleasure to send you by direction of the Treasurer the inclosed cheque for £12, to cover your disbursements in connection with your recent visit to this country for the purposes of the demonstration, which you were good enough to give, of Prof. [Professor Gabriel Jonas] Lippmann's system of Colour Photography at our Conversazione on the 6th inst. [instant]. I shall be much obliged by your acknowledging receipt of the amount upon the inclosed form. I am, Monsieur le Baron, yours faithfully, Robt Harrison Asst. Sec. RS. [Assistant Secretary, Royal Society]'. 13 May 1896