Lieutenant-Colonel Clement Delves Hill
He joined the Royal Horse Guards as a cornet on 22 August 1805 and was promoted to lieutenant on 6 March 1806. Promotion to captain followed on 4 April 1811; to major on 19 December 1811 to lieutenant-colonel on 30 December 1813 to colonel on 21 June 1827 and to major-general on 10 January 1837.
After arriving in Portugal he served throughout the Peninsular War as aide-de-camp to his elder brother Lord Hill and was slightly wounded during the campaign.
He was present at the Battle of Waterloo where he was wounded when a sword was thrust through his thigh, pinioning him to the ground.
In my opinion this site is the best source of uniform reference for the 100 days (Waterloo) campaign: