Copy letter from Robert William Frederick Harrison, to Major B Baden-Powell, 32 Princes Gate, S.W. 'Dear Sir, Soiree Your kind offer to exhibit your "Unilens" at the forthcoming Ladies' Conversazione has been considered by the Exhibits Committee but they think that at this late date after its production it hardly possesses sufficient novelty to justify its inclusion in the programme. I am, faithfully yours, Robt [Robert] Harrison Assistant Secretary R.S. [Royal Society]'. 4 June 1907