|Died||8 March 1861|
|Commands held||Commander-in-Chief, Scotland|
|Awards||Knight of the Royal Guelphic Order|
Riddell was commissioned in 1798 and took part in the Battle of Copenhagen in August 1807 during the Napoleonic Wars. He became a major in 50th Regiment of Foot on 12 December 1807 and transferred to the 79th Regiment of Foot on 21 April 1808. He became permanent assistant at the Quartermaster General's Department on 4 January 1810 and then went to Spain as Assistant Quartermaster General on the staff in November 1810. He was present at the crossing of the River Bidasoa in 1813.
- "History of the ancient Ryedales, and their descendants in Normandy, Great Britain, Ireland, and America, from 860 to 1884". Retrieved 29 November 2014.
- "British Regiments and the Men Who Led Them 1793-1815: 79th Regiment of Foot". Napoloean Series. Retrieved 29 November 2014.
- "No. 20711". The London Gazette. 5 March 1847. p. 918.
- "Henry James Riddell". The Peerage.com. Retrieved 29 November 2014.
- Monuments and monumental inscriptions in Scotland: The Grampian Society, 1871
Sir Neil Douglas
| Commander-in-Chief, Scotland
Sir Thomas Napier
| Governor of Edinburgh Castle|