Professional correspondence by Hedli Anderson, later MacNeice, mainly relating to recitals, recordings, and other engagements and collaborations as a singer, to the history and interpretation of songs, etc., 1939-1975 and n.d. Also includes correspondence with The Britten Estate and with the Britten-Pears Foundation regarding Anderson's work with Britten and W.H. Auden ('Cabaret Songs') in 1939, 1983-1989.