Copy letter from Robert William Frederick Harrison, to Sherard Cowper-Coles, Artillery Mansions, Westminster 'Dear Sir, With reference to your offer of an exhibit for the Soirée on May 13th, the Soirée Committee have pleasure in accepting it, provided you can manage with a small space, and that the conditions of the exhibit imply safety. Kindly return the enclosed schedule at your early convenience. I am, Dear Sir, faithfully yours, Robt [Robert] Harrison Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 29 April 1904