Copy letter from Michael Foster, to R D'Oyly Carte, Savoy Theatre, Beaufort Buildings, W.C. 'I am directed to return thanks for your courtesy in granting to the Royal Society telephonic communication with the Savoy Theatre at their Conversazione recently held here. The privilege was fully appreciated and the exhibit attracted much attention. I am, Sir, your obedient Servant, (signed) Michael Foster Sec. RS. [Secretary, Royal Society]'. 29 June 1887