Weir 2012, p. 226. "Letters Patent by Henry VIII, reveal that Mary had been posthumously accorded the title Dame Mary Stafford. Her husband, William, had been knighted on 23 September 1545, with Mary having died in 1543, two years earlier. These letters indicate that, in their final years, the couple had remained outcasts from the court and in 1542 were dealing with family real estate concerns, living in retirement at Rochford Hall in Essex, which was owned by the Boleyns." Weir, Alison (2012). Mary Boleyn: 'The Great and Infamous Whore'. London: Vintage Books. ISBN9780099546481.
Henry Ellis, Original Letters Illustrative of English History, series 2 vol. 1 (London, 1827), pp. 183, 186: Henry Ellis, Hall's Chronicle (London, 1809), p. 518