an administrative division of the Hudson's Bay Company. See 1929 quote.
1929  (1931)  The Montreal Department comprised whatever business was done in the Canadas, and included the Kings Posts, and at a later date part of Labrador.
1956  In 1842, 3,000 prime otter and 150 fisher were sold to the Russian American Company. Otter skins were brought from the Montreal department and from Albany and disposed of in this market.