Catherine Carey Francis and Lady Knollys produced a number of offspring who survived to maturity. Of the children listed, only the last, Dudley, is known to have died in infancy: The possibility that Catherine, and perhaps her brother Henry, were illegitimate children of Henry VIII, appears in many works of fiction, including Philippa Gregory's "The Other Boleyn Girl". Catherine Carey is also a character in Gregory's "The Boleyn Inheritance", where she is sent to the royal court during the time of Queens Anne of Cleves and Catherine Howard, and in "The Virgin's Lover", where, as the mother of the seventeen-year-old Lettice Knollys,
Catherine Howard later gave evidence in the inquiry against her. Mannox and Catherine both confessed during her adultery inquisitions that they had engaged in sexual contact, but not actual coitus. When questioned Catherine was quoted as saying, "At the flattering and fair persuasions of Mannox, being but a young girl, I suffered him at sundry times to handle and touch the secret parts of my body, which neither became me with honesty to permit nor him to require." The interferences by Mannox came to an end in 1538, when Catherine, now aged 15, moved to the Dowager Duchess's household in Lambeth. There