Letter, [n.d], London, Robert Trevelyan to Charles Ricketts. Enclosing the libretto of the ' Bride of Dionysus' and arranging a meeting with Tovey. Holograph signed.

Letter, 3 December 1941, London, A. L. Middleton to Bobbie, [Robert Trevelyan]. Thanking the recipient for sending a book and describing memories of Tovey as a young boy. Holograph signed.

Letter, 14 October 1939, London, B. J. Simmons & Co to Robert Trevelyan. Concerning the storage and ownership of the costumes for ' The Bride of Dionysus'. Typescript copy.

Letter, [n.d], London, Charles Ricketts to Robert Trevelyan. Enclosing estimates for props, and plans to arrange a meeting. Holograph signed.

Letter, [n.d], London, Charles Ricketts to Robert Trevelyan. Discussing the possibilities for scenery that ' The Ariadne ' produces, discussing Ricketts fee for designing scenes, and a comment on the quality of drama in the writing, inviting Tovey to dinner in a post script. Holograph signed.

Letter, [n.d], London, Charles Ricketts to Robert Trevelyan. Discussion of materials for the models , and informing Trevelyan that Ricketts assistant Johnstone is coming to Edinburgh and an estimate for the cost of work on the props and models. Holograph signed.

Letter, 28 November 1945, London, Norman Peterkin to Robert Trevelyan. Expressing Hubert Foss's worries about printing Tovey's essay, 'Music in German Culture', 1914, because of its views on the war and Nazism. Typescript signed.

Letter, 14 December 1945, London, Norman Peterkin to Robert Trevelyan. Concerning material for a biography of Tovey and a meeting with Peterkin, Grierson, Guthrie, Foss and John Tovey. Typescript signed.

Letter, 27 January 1945, London, Norman Peterkin to Robert Trevelyan. Concerning a meeting with Grierson to discuss the biography of Tovey. Typescript signed.

Letter, 19 December 1946, London, Norman Peterkin to Robert Trevelyan. Discussing the production of a Tovey biography by either Foss or Grierson. Typescript signed.