Sempronius Stretton CB (15 May 1781 – 6 March 1842) was a British Army officer who served in numerous campaigns including the Battle of Waterloo.

He entered the army at an early age, commencing his military career in the Nottinghamshire Militia, which he joined at Dumfries, in April 1800.

Whilst he was in Canada he used his artistic skills to sketch not only landscapes but also made a valuable record of the wildlife and the local dress.

[3] Stretton's 1804 sketch of "York Barracks, Lake Ontario, Upper Canada, 1804" is credited as being one of the earliest pictures of what was to become the city of Toronto.

[7] On 28 July 1813, Captain Stretton received the thanks of Lord Wellington, conveyed to him through William V, Prince of Orange, for the gallant defence made by the 40th, under his command, supported by two Portuguese regiments, in defending the position on the heights before Pampeluna.

When the army was withdrawn from France, he accompanied it to New Orleans in 1814, and nearly lost his life when shipwrecked in the Baring transport in Bantry Bay on 10 October 1814.

[2] The troops returned to Portsmouth, and the 40th, with other regiments, proceeded to Flanders, and joined the army assembled near Brussels, in time to share in the memorable victory of Waterloo, during which he had a horse killed.

On the corps being ordered to New South Wales, he retired on half-pay and spent several years travelling in Europe, returning occasionally to Lenton.