other is there. They bristle up, exchange a few un- 

 friendly roars and growls, make a threatening 

 move or two, and then go on. Sometimes they pass 

 as though unconscious of each other's presence. 



A network of trails extends over the grizzly's 

 mountain home. These reach food-supply centres, 

 lookout and resting stations, swimming-holes, and 

 other places often visited. Generally when going 

 anywhere the grizzly follows a trail ; if pursued, he 

 is most certain to do so. Many of these trails are 

 dim, but others are deeply worn. He may some- 

 times make a new trail, but in general he follows 

 the old ones which have been used by generations 

 of bears. His domain may be crossed by other wild- 

 life trails, which he may or may not use. 



Topography, mountain barriers, streams, or 

 other natural boundary -lines in part determine the 

 form of the grizzly's home territory. The size is 

 determined by the food-supply, by the bear popu- 

 lation of the region, and by individual prowess. A 

 bear of exceptional prowess may hold an empire. 



The territory dominated by old "Timberline" 

 had an area of about eighty square miles. The 

 western boundary-line followed the rim of the Con- 

 tinental Divide for nearly fifteen miles. Meeker 

 46 



