Copy letter from Lord Kelvin, William Thomson, to Sir Francis Walter de Winton [Letter crossed through and annotated as 'cancelled'] Asks de Winton to place the enclosed card of invitation [to the forthcoming Conversazione, not attached] before His Royal Highness the Duke of York, and express to him on behalf of Thomson and the Council the great gratification it would give them and the Fellows of the Society generally if their Royal Highness would honour them with his presence on this occasion. 15 May 1895