List of holdings in the English National Portrait Gallery for which she sat, including two online copies of photographs.

Brief biography from Composers.net noting highlights of her musical development.

Detailed biography showing much of her unhappy personal life and later problems with alcohol as well as detailing her abilities and triumphs by David C. F. Wright for MusicWeb UK.

Extracts from a BBC interview in RAM audio with biography, photograph, and selected key works.

Biography noting her inability to compromise in musical or personal matters from the University of York Music Press. Includes photograph, categorized works list, and discography.

Filmography showing a number of horror films from the Internet Movie Database.

Biography from All Music Guide emphasizing her maverick spirit in intentionally avoiding European trends and her abilities in providing settings for verse.

Listing at The Lied and Art Song Texts Page with listing of selected vocal works including lyrics to "Ô saisons, ô châteaux."

Biography noting serialism and operatic, vocal, orchestral, film, and chamber works from the Grove Concise Dictionary of Music entry at WQXR radio.