She is recognised for expanding the scope of academic research in drama from texts to organisation of theatres, biographies of actors, and scene design.
[1] Rosenfeld ran a Jewish society for girls in Paddington; before the Second World War, she moved into an apartment in Bayswater where she spent the rest of her life.
[2] It was reviewed as enthusiastic, yet scholarly and lauded for recovering the personages that enabled theatre to survive through the times of Cromwellian repression after the English Civil War.
[3] In 1945, Rosenfeld became a co-editor of the journal Theatre Notebook founded by Ifan Kyrle Fletcher, a role she held for twenty five years, and to which she contributed over 80 articles.
[4] Her pamphlet Foreign Theatrical Companies in Great Britain in the 17th and 18th Centuries (1955) explored the interactions between Italian and French drama companies in London, while Theatre of the London Fairs in the 18th Century (1960) brought out a hitherto unresearched area of the history of English theatre, its popular aspect.