Copy letter from Robert William Frederick Harrison, to Henry Sand, University College, Nottingham 'Dear Sir, Your offer to exhibit at the Soirée on May 9th has been under consideration, but the Committee of Exhibits think that the arrangement would involve an amount of trouble and a degree of space which hardly warrants our accepting the exhibit; but they desire to thank you for the suggestion. I am, faithfully yours, R Harrison Assistant Secretary R.S. [Royal Society]'. 24 April 1906