The most considerable affluent of Lake Superior upon its northern coast is the Nepigon River, coming grandly down cascades and rapids, bringing the waters of Lake Nepigon, an elliptical lake among the mountains to the northward covering about four thousand square miles, bounded by high cliffs, and elevated over eight hundred feet. It is studded with islands, has very deep waters, and receives various streams from the remote northern wilderness. Upon the northwestern shore of Lake Superior are gigantic cliffs, surrounding Thunder Bay, a deep indentation divided from Black Bay by the great projecting promontory of Thunder Cape, rising nearly fourteen hundred feet in grand columns of basalt, the summit containing the crater of an extinct volcano. Across from it is McKay Mountain, another basaltic Gibraltar, rising twelve hundred feet from the almost level plain bordering the bay. Pic Island is between them, guarding the entrance. The pretty Kaministiquia River flows through rich prairie lands down to Thunder Bay, and here is the chief Canadian town on the lake, Port Arthur. Thirty miles up this river is the famous Kakabika Falls, where the rocks are cleft so that the stream tumbles into a chasm one hundred and thirty feet deep, and then boils along with rapid current for nearly a half-mile through the fissure, the sides towering perpendicularly, and in some places even overhanging their bases. Upon this river was for many years the well-known Hudson Bay Company's fur-trading station of Fort William, which now has grain elevators, and is a suburb of the spreading settlement of Port Arthur. This was the beginning of the great portage from Lake Superior over to the Hudson Bay waters at Fort Garry, on the Red River in Manitoba, now Winnipeg, the portage being the present route of the Canadian Pacific Railway. SAULT SAINTE MARIE TO DULUTH.