"known as earl of Tinmouth until he became duke of Liria in 1716. Volume two of the Complete Peerage (1912), following earlier authorities, thought that he was attainted in England about this time, but an appendix in volume twelve, part two, showed that no act of attainder was brought against Berwick in parliament and that there is no evidence that Berwick was outlawed, which would also have resulted in attainder. Berwick thus probably retained his English peerage until his death" (Handley 2011). Handley, Stuart (May 2011). "Fitzjames, James, Duke of Berwick upon Tweed (1670–1734)". Oxford Dictionary of National Biography (online ed.). Oxford University Press. (Subscription or UK public library membership required.)
"No. 2224". The London Gazette. 10 March 1686. p. 2. Note that dates given for Gazette issues before 1752 are Old Style, with the new year not beginning until 25 March. By modern reckoning, this issue would be dated 1687
