Career
He represented Prescott in the Legislative Assembly of the Province of Canada from 1844 to 1848. He came to Upper Canada from the Isle of Skye with his family in 1816. Stewart settled at Vankleek Hill.
He served as the first postmaster for Vankleek Hill, as a justice of the peace and as county treasurer.
In 1878, Stewart established two prizes awarded annually to students studying biblical Hebrew language and literature in the Faculty of Religious Studies at McGill University.