Comprises:Folder 1: letters received from correspondents including Antony Armstrong-Jones, 1st Earl of Snowdon, Sir John [Jacob] ('Jakie') Astor, Jonathan Lieberson, philosopher, and Diana Rigg, actress, 1972-2002 and n.d. [c.1970-1979]. Also includes letters of thanks following the celebration of the 70th birthday of John Betjeman, 1976 (= Closed). Folder 2: letters and cards received from Deborah and Andrew Cavendish, Duke and Duchess of Devonshire, and Lady…