The XY Company merged into the North West Company in 1805. Morrison continued to work for the company, with his yearly wages from 1812 to 1816 being reported at 1,200 livres. Morrison's territory of operations was bought by John Jacob Astor's American Fur Company. While a member of this company, Morrison was listed as a superintendent of the department and developed a reputation for starving competition out of existence. George Simpson of the Hudson's Bay Company considered Morrison as one of the best and most experienced traders in the region.
