The other document is an account of the notorious Battle of Seven Oaks in 1816 by Angus Shaw of the North West Company (NWC) - a rival fur trading company to the Hudson's Bay Company in which Lord Selkirk was a majority shareholder.

BBC: Red River letters

The Fur Auction got its start in 1670 as the Hudson's Bay Company, which bought furs from trappers and shipped them to London.

FORBES: Adventures in the Skin Trade