The score for Mayerling was commissioned by Kenneth MacMillan from John/Jack Lanchbery, who used arrangements of music by Franz Liszt. This file comprises of

1. One handwritten airmail letter to Iris Law, Administrative Assistant at The Royal Ballet, about starting work on the score. 8 Nov 1976
2. One typed and four handwritten letters from Jack Lanchbery to Kenneth MacMillan, plus one telegram and one photocopy of a letter in the Royal Opera House Archives, discussing the score, its state of preparation, and changes and cuts requested by Kenneth MacMillan. The final letter discusses cuts for when the ballet tours to America and the request for a new song
3. One page of a handwritten list of Extracts Agreed, in an unidentified hand
4. One page of a handwritten letter from Bernadette [Greevy] to Kenneth MacMillan expressing regret that her song needs to be cut, with alternative suggestions, 28 Mar 1978

This file contains correspondence from members of the public in response to both the first night of Mayerling and the London Weekend Television programme about the ballet

One file containing handwritten notes and typed breakdown of the ballet. The material comprises

1. Three typed pages of breakdown of the action of the ballet by Act and Scene, with timings, with annotations by Kenneth MacMillan in blue/black ink, black biro and purple felt tip pen. Each page signed by Kenneth MacMillan
2. Four handwritten pages of breakdown of the ballet by Act and Scene, with timings. By Kenneth MacMillan tbc in blue felt tip pen
3. Two handwritten pages of breakdown of the ballet by Act and Scene, with timings. By Kenneth MacMillan in black felt tip pen on Hotel Schlossgarten, Stuttgart, headed notepaper. The ink is bleeding a little
4. Five handwritten pages of breakdown of the ballet by Act and Scene, with timings. By Kenneth MacMillan in black biro with additions in blue felt tip pen
5. Photocopy of a two page handwritten letter from Kenneth MacMillan to Gillian Freeman enclosing the 'breakdown for the Mayerling file*, with some thoughts on the ballet. From the Clement Crisp Collection, found in a press cutting file. n.d.

In 1978 MacMillan's Mayerling directed by Derek Bailey was nominated for, and won, the British Academy of Film and Television Arts Award for Best Television Documentary. This file contains two tickets, a printed card, typed sheet of the Presentation Ceremony Programme Schedule, a souvenir programme, and a letter of congratulation from David [?], on Sydney Opera House Trust headed notepaper, 5 Oct 1978

The Ankara State Ballet of Turkey contacted Kenneth MacMillan, via the British Council, to ask to stage The Invitation in their 1985-1986 season, and in 1992 to stage Mayerling. Neither project was realised. The letter from The British Council, 6 Mar 1992, has a handwritten draft reply by Kenneth MacMillan