Letter, 11 February 1917, Surrey, Sophie Weisse to Robert Trevelyan. Informing Trevelyan that Miss. Weisse has found final sketches for the end of the opera, and that Thomas Beecham will be visiting Edinburgh in a month. Holograph signed.

Letter, 18 October 1917, Surrey, Sophie Weisse to Robert Trevelyan. Requesting that Trevelyan encourage and inspire Tovey to finish his opera. Holograph signed.

Letter, 3 December 1916, Surrey, Sophie Weisse to Robert Trevelyan. Enclosing the ms. score for the 'Bride of Dionysus', and inviting Trevelyan to visit. Holograph signed.

Letter, 13 April 1929, London, W. Clarkson to R. C. Trevelyan. A receipt for payment for costumes for the 'Bride of Dionysus', and wishing the opera every success. Typescript signed, with stamped receipt.

Letter, 15 May 1929, Edinburgh, W. D. Smart to Robert Trevelyan. Note of finances connected with the opera and Reid orchestra and enclosing a cheque for Trevelyan. Holograph signed.

Letter, 6 May 1932, Edinburgh, W. D. Smart to Robert Trevelyan. Note of finances connected with the opera and Reid orchestra and enclosing a cheque for Trevelyan. Holograph signed.

Letter, 30 October 1939, Edinburgh, Wallace & Guthrie to Robert Trevelyan. Informing Trevelyan of correspondence with Messers. Howard & Wyndham and Messers. Clarkson. Typescript signed.

Letter, [n.d], William Strecker to Robert Trevelyan. Thanking Trevelyan for writing, discussion of Tovey's completion of the opera, offering help with the production of the opera, news that Strecker is tired of his imprisonment. Holograph signed, written on German Prisoner of War notepaper, with a postmark, Alexandra Palace.

Letter, 27 May 1931, Edinburgh, Loudoun Shepherd to Robert Trevelyan. Concerning arrangements for 'The Bride of Dionysysus'. Typescript signed.

Letter, 15 March 1929, London, W. Clarkson To [ Donald Tovey and R. C. Trevelyan]. Concerning the price of wig hire for the ' Bride of Dionysus'. Typescript signed.