[3] His marriage to the wealthy Lady Mary Charlotte Anne Wellesley-Pole, the niece of Arthur Wellesley, 1st Duke of Wellington, and other Bagot family connections made possible his subsequent diplomatic career.

He also contributed to negotiations leading to the Anglo-American Convention of 1818, which defined the border between British North America and the United States from Lake of the Woods (see Northwest Angle) to the Pacific Ocean.

After a hiatus of ten years from diplomatic service, Bagot agreed to succeed Lord Sydenham as governor general of the newly proclaimed Province of Canada.

As an important concession, however, Bagot did allow the leading Canadian colonial politicians Robert Baldwin and Sir Louis-Hippolyte Lafontaine to form a ministry, on the basis of their parliamentary majority.

Lafontaine, as a French-Canadian leader, had suffered abusive treatment by the British under the previous governor general, Lord Sydenham, who had died in office in 1841.

Bagot worked productively with Baldwin and Lafontaine to establish a structure for fair municipal governance in the province of Canada.

While serving as governor-general, Bagot ordered the first criminal extradition of a fugitive slave to the United States from Canada West.

In 1841, Hacket allegedly stole a beaver overcoat and a racing mare from his master, as well as a gold watch and a saddle from two others, and fled to Canada West.

[7] Bagot married Lady Mary Charlotte Anne Wellesley, daughter of William Wellesley-Pole, 3rd Earl of Mornington on 22 July 1806.