He remained with the older Doyle throughout the British expedition to Egypt and was at the Battle of Fuentes de Oñoro and the storming of Ciudad Rodrigo.
[1] At the end of the war with the defeat of Napoleon, Doyle left the Anglo-Portuguese Army, was made a Knight Commander of the Order of the Bath, and was appointed as inspecting officer of militia in Guernsey.
He was arrested by Dom Miguel, imprisoned for months in Lisbon, and not released until after the British minister, Sir Frederick Lamb, took up his case.
Finally giving up, in July 1853 he accepted an appointment as a Military Knight of Windsor and as a sergeant-at-arms to Queen Victoria.
[1] Doyle died at Windsor Castle on 9 August 1856 and was buried with military honours near the south side of St George's Chapel.