Karl II. war Lucy Walter, die aus Wales stammte, in den Niederlanden, in denen er sich nach seiner Flucht aus England ebenfalls befand, begegnet. "... [John] Evelyn [1620-1706] found her 'a brown, beautiful, bold but insipid creature', and there can be little doubt that Charles fell genuinely in love. The son she bore in April [am 9.] he acknowledged as his own, and young James, as he was christened, remained the favourite and best-loved of his children." (in: Christopher Falkus: The Life and Times of Charles II, id. pp. 31-35). Lucy, die schon bald ihre Gunst bei Karl II. verlor, da sie mit vielen anderen Männern sexuelle Verhältnisse eingegangen war, starb völlig verarmt und vergessen im September oder Oktober 1658 in Paris. Ihr Sohn wuchs auf Befehl von Karl II. bei einem gewissen Lord Crofts auf.
"Lucy Walter's own mother was a niece of the Earl of Carbery; she herself came of a perfectly respectable Welsh family, hence her appealing, dark-eyed Celtic looks. ... Lucy Walter probably ended up at The Hague [wo sie Karl II. Stuart begegnete] via Paris, having been taken there by her uncle. ... Her liaison with Charles continued sporadically until 1650. Now know as Mrs. Barlow, she was with him in Paris, witnessed by Evelyn, and possibly in Jersey. Thence she passed into other hands, Charles himself was absent from her side for nearly two years while he was in Scotland and England; during this time her second child [nicht von Karl II. Stuart], Mary, was born. Furthermore, Lucy contemplated wedding Sir Henry de Vic, the English resident in Brussels, with the full approval of Charles [aus dieser Heirat wurde nichts] ... For Lucy Walter died in 1658, to be buried in an unnamed grave in Paris." (in: Antonia Fraser: King Charles II, id., pp. 63-66).