Under the name A.D. Wraight, she published in support of the Marlovian theory, the argument that Christopher Marlowe was the true author of William Shakespeare's works.
She played a significant role at the start of the educational scandal at the William Tyndale, which culminated in a formal public enquiry in 1975.
[4] Her interest in Marlowe began in 1955 when the American writer Calvin Hoffman, who popularized the Marlovian theory, published his book The Man Who Was Shakespeare.
[6] In 1965, as A. D. Wraight, she published an illustrated biography, In Search of Christopher Marlowe (in collaboration with the American photographer Virginia Stern).
In place of the usual assumption that most of the sonnets are addressed to a young man (the "Fair Youth"), she put forward a theory that there were at least three young men: In 1996 she published Shakespeare: New Evidence, which presents archival discoveries she made with Peter Farey about a spy called Le Doux, who she suggested might be Marlowe.