From 1799 until his premature death in 1814 he kept an extensive diary which is the most complete record ever printed of the daily life of a fur trader in the north.
[1] These journals cover everything that happened to him in a most matter-of-fact manner and have yielded much material for historians and other researchers of that time period in North American history.
Henry married the daughter of Liard Ah-ne-him-ish Cottonwood Little Shell, the brother of the Great Pembina Chippewa Nation Grand Chief La Petite Coquille Little Shell I Corbeau and son of The Great Sioux Nation & The Great Pembina Chippewa Nation Wazhazha Mdewakanton Grand Chief Little Crow I Petit Corbeau Red Wing I.
In Canada, he travelled through Ontario, Manitoba, Assiniboia, Keewatin, Saskatchewan, Alberta and British Columbia.
In 1800, during the building of Pembina Post, Red River district, the Indians were extremely inquisitive about Henry's doings with pen and paper.