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, 19 November 1916, Surrey, Sophie Weisse to Robert Trevelyan. Asking that Trevelyan become a trustee of Miss. Weisse's will. Holograph signed.

Letter, 26 November 1916, Surrey, Sophie Weisse to Robert Trevelyan. Requesting that Trevelyan inform Miss. Weisse whether he consulted with Tovey or not before deciding to act as trustee to Miss. Weisses will. 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, 7 December 1916, Surrey, Sophie Weisse to Robert Trevelyan. Arranging for Trevelyan to meet Mrs. Annie Brown who will have papers and the ms. Asking if Tovey plans to go to Holland soon. Holograph signed.

Letter, 14 December 1916, Surrey, Sophie Weisse to [Robert Trevelyan]. Describing a performance of ' The Frogs'. Holograph signed, letter written to ' you rascally poet'.

Letter, 22 November 1932, Surrey, Sophie Weisse to Robert Trevelyan. Discussion of poetry as an art. Holograph signed.

Letter, [n.d], Surrey, Sophie Weisse to [Robert Trevelyan]. Discussion of a grave of a composer and news that Lady Tovey has deposited Tovey ms. in a bank. Holograph incomplete.

Letter, 6 August 1918, Surrey, Cecilia Warre Cornish to Donald Tovey. Expressing a concern for Tovey and his unkempt appearance, mentioning his wifes illness, and Miss. Weisse's plans to send Tovey his mss, . Holograph signed.