Copy letter from Lord Rayleigh [John William Strutt], to Major-General Sir Francis W de Winton 'Sir, I shall be much obliged if you will place the enclosed card of invitation before His Royal Highness the Duke of York and express to him on behalf of myself and the Council the great gratification it would give us and the Fellows of the Society generally if His Royal Highness would honour us with his presence on this occasion. I am, Sir, your obedient servant, (signed) Rayleigh Sec. R.S. [Secretary, Royal Society]'. April 1894