Source note

SAN REAL (Marquise de), wife of the preceding, born Margarita-Euphemia Porraberil, natural daughter of Lord Dudley and a Spanish woman, and sister of Henri de Marsay; had the restless energy of her brother, whom she resembled also in appearance. Brought up at Havana, she was then taken back to Madrid, accompanied by a creole girl of the Antilles, Paquita Valdes, with whom she maintained passionate unnatural relations, that marriage did not interrupt and which were being continued in Paris in 1815, when the marquise, meeting a rival in her brother, Henri de Marsay, killed Paquita. After this murder, Madame de San Real retired to Spain to the convent of Los Dolores. [The Thirteen.]