In 1764 he took part in Colonel John Bradstreet's expedition and in 1770, with Sir William Johnson, the duke of Gloucester and others, he formed a company to mine copper in the Lake Superior region. Henry was a fur-trader again until 1796 and then became a merchant in Montreal, Quebec in Canada where he lived until his passing in 1824.
His Travels and Adventures in Canada and the Indian Territories between the Years 1760 and 1776 (1809; reprinted 1901) is a valuable account of the fur trade and of his adventures at Michilimackinac.
He should not be confused with his nephew of the same name, also a fur-trader, whose journal was published in 1897 in 3 vols., as New Light on the Early History of the Greater Northwest.
Alexander II (August 24, 1198 – July 6, 1249), king of Scotland, son of William I, the Lion, and of Ermengarde of Beaumont, was born at Haddington, East Lothian, in 1198, and succeeded to the kingdom on the death of his father on 4 December 1214.
Diplomacy further strengthened the reconciliation by the marriage of Alexander to Henry's sister Joan of England on June 18 or June 25, 1221.
A threat of invasion by Henry in 1243 for a time interrupted the friendly relations between the two countries; but the prompt action of Alexander in anticipating his attack, and the disinclination of the English barons for war, compelled him to make peace next year at Newcastle.