Pierre de Maillezais, Entre histoire et légende : la fondation de l'abbaye de Maillezais, récit du moine Pierre, (ed. and tr. by Y. Chauvin and G. Pon), La Roche-sur- Yon, 2000. The Latin text is in Philippe Labbe (1657). Nova Bibliotheca manuscriptorum librorum (in Latin). Vol. Tomus secundus. Paris: apud Sebastianum Cramoisy. pp. 222–238.
François de Sourdis died on 8 February 1528. Aillery, p. 138. Gauchat, Hierarchia catholica IV, p. 6 no. 32, 123. L.-W. Ravenez (1867). Histoire du Cardinal François de Sourdis (in French). Bordeaux: G. Gounouilhou. p. 164.
Henri d'Escoubleau was the nephew of Bishop Henri d'Escoubleau de Sourdis; his mother was the aunt of Gabrielle d'Estrées, mistress of Henri IV. He was chosen to be Bishop of Maillezais at the age of eighteen, and could not be consecrated until 19 May 1623; this was accomplished in Paris at the Chartreuse by his brother François de Sourdis. He served as Cardinal Richelieu's Majordomo, and was with King Louis XIII at the siege of La Rochelle (1627–1628) and in the campaign in Piedmont. On 16 July 1629 he was appointed Archbishop of Bordeaux by Pope Urban VIII. He died on 18 June 1645. Eugène Sue (1839). Correspondance de Henri d'Escoubleau de Sourdis: augmentée des ordres, instructions, et lettres de Louis XIII et du Cardinal de Richelieu (in French). Vol. Tome I. Paris: Crapelet. pp. iii–iv. Gauchat, Hierarchia catholica IV, pp. 123, 229. Aillery, p. 138.