Papers of Lorna Letcher, nee Rees, (a pupil of Imogen Holst at Dartington Hall) including;
- music manuscripts of Imogen Holst, including Benedick and Beatrice piano part; Wheatley Processional; A Virgin most pure; The Seven Joys of Mary; Bedfordshire May Day Carol; Matthew, Mark and Luke and John; Cherry, Holly and Ivy; The Cuckoo; I must live all alone; Blow away the morning dew.
- correspondence from IH to Letcher, 1951-1983
- correspondence with others, 1949-1989
- miscellaneous items including programme for Bach's Mass in B Minor at Dartington Hall Summer Festival 1950, photograph of the Amadeus Quartet at Bryanston 1951, 'Memories of the Amadeus Quartet 1949-1951' written in 1979, photocopy of programme for two operas performed at Dartington Hall in 1951 (Noah by James Butt and Benedick and Beatrice by IH)