Copy letter from Robert William Frederick Harrison, to Sherard Cowper-Coles, Grosvenor Mansions, Victoria Street, S.W. Is requested by the Soiree Committee to thank Cowper-Coles for his kind offer to exhibit at the forthcoming Soiree his model showing the effect of a scratch upon the molecular structure of electro-deposited metals and to say they regret that it will not be feasible to include it in the programme, which is already full. 8 May 1905