In August 1811 he became a Lieutenant colonel in the 23rd Light Dragoons but remained on Wellington’s staff until July 1812.
Collection of letters from George Hervey Percival Coldstream Guards
Journal of Captain William Smith 11th Light Dragoons
Lieutenant 4th Dragoons,Peninsular War, 1809-11.
Mackenzie originally joined the Royal Marines in 1178 and served in India and the West Indies. He commanded a brigade in the army under Sir Arthur Wellesley in Spain in 1808-9. He was killed at Talavera, July 28th, 1809.
Commanding 4th Company, 7th Battalion, Royal Artillery
Letter to His Excellency Charles Stuart
Letter to Sir Charles Stuart
Letter to Charles Stuart, Esq.
Serving as the Colonel of the Spanish Hibernia Regiment, in 1810 he became a Brigadier-General and in 1814 a Major-General. He became a Marshal in the Spanish in later life.
To Mr William Lewin, No.20 Victualling Office Row, Grove Lane, Deptford, England
Arrangement for the sick of the 4th Division officers in the divisional hospital at Aldea d’Obispo
William Howard, Lt Colonel commanding