Slave river, which discharges the water of Lake Athabaska and Peace river into Great Slave lake, is practically an upper reach of the Mackenzie, its course being in the same general direction but the name “Mackenzie” is given only to that long stretch of navigable water from Great Slave lake to the sea. As Mackenzie river itself is the outstanding geographical feature of the country, as it is the main channel of communication, and as all the settlements are situated upon its banks or those of its tributaries, a table of distances along this gigantic waterway may prove to be a useful guide to those readers of these pages, who are not familiar with the geography of the country. The table is compiled from the report by Wm. Ogilvie, D.L.S., of his survey, and the figures cover the route from Fort Smith, on Slave river, practically on the Alberta boundary line, to Fort McPherson on the delta of the Mackenzie:— MILES. Fort Smith 0 Fort Resolution 190·5 Buffalo creek 202·5 Buffalo river 249·5 Hay river 276·5 Great Slave lake 311·5 Fort Providence (lat. 61·4°) 357·5 Little lake 381·5 Yellowknife river 417·9 Head of Line 444·0 Fort Simpson (lat. 61·8°) 515·0 Nahanni river 590·2 Willow lake river 606·5 River between Two Mountains 645·5 Fort Wrigley (lat. 63°) 649·0 Le Vieux Grand Lac river 723·0 Gravel river 764·2 Fort Norman (lat. about 65°) 829·3 Great Bear river 829·5 Carcajou river 945·5 Mountain river 950·2 Sans Sault rapids 950·8 Beaver river 987·8 Ramparts 989·9 Fort Good Hope (lat. 66·16°) 998·8 Hare Indian river 1001·1 Loon river 1022·7 Large river entering on east side, name unknown 1153·0 Red river 1213·4 Delta of Mackenzie 1241·4 Fort McPherson (lat. 67·26°) 1273·5