Hudson's Bay Co. fort on an island at southern end of Marian lake, tributary to North Arm of Great Slave lake. Present location and previous site shown on map No. 25 Western sheet of Great Slave lake. Originally Fort Rae was built at mouth of Yellowknife river 1790 and called Fort Providence. About 1850 it was moved to a point of land near the northern terminus of the North Arm on east shore about 10 miles south of Frank Channel. It was again moved about 15 miles farther north to present location. On removal from mouth of Yellowknife river, the name was changed from Providence to Rae after the explorer Dr. Rae. Maps 8, 100-101.