X ILLUSTRATIONS 



Hawk-Proof Nest of a Cactus Wren Facing page 196 



A Peace Conference With an Arizona Rattlesnake . " 196 



Work Elephant Dragging a Hewn Timber .... " 208 



The Wrestling Bear, "Christian," and His Partner . " 216 



Adult Bears at Play " 234 



Primitive Penguins on the Antarctic Continent, Una- 

 fraid of Man " 266 



Richard W. Rock and His Bi^ffalo Murderer ... " 298 



"Black Beauty" Murdering "Apache" ..... " 298 



