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, [n.d], London, Charles Ricketts to Robert Trevelyan. Expressing pleasure that the opera has met with interest and success, hoping that the opera will be put on in Manchester and praise from Johnstone. Holograph signed.

Letter, [n.d], London, Charles Ricketts to Robert Trevelyan. Regretfully informing Trevelyan that Ricketts is too busy to design scenery for Trevelyan's play. Holograph signed.

Letter, [n.d], London, Charles Ricketts to Robert Trevelyan. Suggesting that Trevelyan should keep hold of the sets and scenery for a production of the opera at Manchester and not donate the sets to the opera company. Holograph signed.

Letter, 4 April 1940, London, G. N. Milne to Robert Trevelyan. Informing Trevelyan that Clarksons has gone into liquidation, and requesting that Milne look after hampers of Greek columns for Trevelyan. Holograph signed.

Letter, 1 June 1943, London, Hubert Foss to R. C. Trevelyan. Discussion of an edition of Tovey's works in their incomplete and unrevised state. Typescript signed.

Letter, 12 January 1944, London, Hubert Foss to Robert Trevelyan. Informing Trevelyan that Foss has received a proof for an article in 'Music and letters', and news of Miss. Weisse and her state of health. Holograph signed.

Letter, 6 May 1940, London, Josolyne, Miles, Page & Co to Robert Trevelyan. Informing Trevelyan that Josolyne Miles Page & Co have advised Mr. Milne to remove and store goods on behalf of Trevelyan. Typescript 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.