`Registre de la campagne d`Espagne` of General Étienne Heudelet de Bierre: 5 separate gatherings of leaves amongst some of which a few letters addressed to Heudelet have been inserted., 1808-1809., Adv.MS.46.5.21. Correspondence and papers of General Sir George Murray., Adv.MSS.46.1.1-46.10.2. National Library of Scotland Archives and Manuscripts Division. https://nlssb.as.atlas-sys.com/repositories/2/archival_objects/16757 Accessed September 23, 2024.