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 1537. Margaret Douglas died in March 1578, age 63. Her grandson James Stewart became king of both Scotland and England. Other exist, mostly showing her decades after these portraits were painted. The portrait shown on this page, attributed to Hans Holbein, dated circa 1535–1540, is exhibited at the Toledo Museum of Art as "Portrait of a Lady, Probably a Member of the Cromwell Family" (1926.57). Another version of the portrait, now located at Hever Castle, dating from the 16th century, is exhibited as Queen Catherine Howard. The National Portrait Gallery exhibits a similar painting, "Unknown Woman, Formerly Known as Catherine