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, [1917], Edinburgh, J. A. Fuller - Maitland to Sophie Weisse. Praising Tovey's opera, and other material and performances he has produced, . Holograph signed.

Letter, 20 October 1917, Robert Trevelyan to Sophie Weisse. Reassuring Miss. Weisse that Trevelyan has Tovey's best interests at heart and is keen for Tovey to finish the ' Bride of Dionysus'. Holograph in pencil.

Letter, 18 December 1920, Edinburgh, Donald Tovey to Sophie Weisse. Details of music scores and Ms. Tovey has and news of correcting proofs of Bride of Dionysus. Holograph incomplete.

Letter, [1919], Donald Tovey to Sophie Weisse. News of Hartree, Maud Macarthy's engagement, and the development of ' The Bride of Dionysus'. Holograph signed.

Letter, 19 October 1919, Edinburgh, Donald Tovey to Sophie Weisse. Wishing Miss. Weisse a Happy Birthday, comments on the start of the University term, especially on a gifted violin player, suggestion that his work be called a music-drama rather than grand opera, and notes on the Ms. of the work. Holograph signed, written on University of Edinburgh headed paper.

Letter, [1919], Edinburgh, Donald Tovey to Sophie Weisse. Details of trying to contact Beecham to look at Tovey's composition. Holograph signed, written on University of Edinburgh headed paper.

Letter, 27 April 1920, Kent, Donald Tovey to Sophie Weisse. Recommending a doctor to Miss. Weisse, news of the Busch family, development of opera score. Holograph signed.