here is some info from the "the history of argentueil quebec"


CAPT. JOHN STEPHENS, whose early career was singularly eventful, and who, as
his various promotions proved, did honorable service in fighting for his country,
was bom in Wexford County, Ireland, in 1789. He joined the army at the age of
17, entering the 87111 Regt. Foot, in 1806; he was transferred, in 1808, to 4th
G. B., and, in 1810, to the 66th Foot, commanded by his second cousin, General Sir
Oliver Nicolls. He was promoted to the rank of Senior Quarter Master, while under
service at Calcutta, 14111 September, 1815. His length of service in the regular army
was twenty-six years, four of which were spent in India. From India, he
went to the Island of St. Helena, where he acted as one of the Guards of
Napoleon I. His family had in their possession for years a ring presented to him by
the ill-starred Emperor. He left St. Helena in 1821, retired from the 66th Regiment,
came to Canada in 1827, and in 1830 settled in Chatham. At his own request, he was
retired on half-pay o.th December, 1831., In 1833, he received a grant of land in
Litchfield, County of Pontiac, for military service, but did not remove his residence
from Chatham. In 1837, at tne request of Sir John Colborne, he raised a company
of volunteers, and served as Regiment Adjutant in 1838. It was at this time he won
his title of Captain. He became connected with the Presbyterian Church, under the
Rev. William Mair, in 1839, and was appointed Deacon of the same in the following
year ; he was approved by the session of the Church as Eider, but seems to have
declined appointment to that office. His death took place gth October, 1868.



i do have other info as well as his full military records most which are written in his own hands if you are interested feel free to pm me and also i have an idea where the grave is but live 4 provinces away lol