Hudson's Bay Co. post on mainland of North Channel, lake Huron, at the mouth of Mississagi river, about 45 miles west of La Cloche. It was established before 1850 and was probably the old North West Co. post at this place which had existed from about 1800. It is shown on the Arrowsmith map 1857 (No. 8) and on the Standard Sheet Sault Ste. Marie. It does not appear on the Company's lists after 1894. The name is variously spelled, Mitsisagua, Mississaugie.