This map shows the territory covered by the narrative of this book 

 between July, 1906, and September, 1907. More than half of the 

 country north of the arctic circle is a spruce forest, but there are ex- 

 tensive prairies along the arctic coast. The prairie is narrowest on 

 the eastern margin of the Mackenzie delta (20 or 30 miles wide) and 

 broadest near the Colville River in Alaska (150 or 200 miles). Al- 

 though the map is as correct as our present knowledge, there are 

 uncertainties, and authorities differ on many points. For the north 

 coast of Alaska we have followed LeffingwelPs surveys and for the 

 Eskimo Lakes those of Harrison. These are much the best sources 

 available. 



