CHAPTER VI. 



THE GREAT PLAIN OF THE COLUMBIA POND TURTLES AND THEIR 



NESTS THE SAGE RABBIT FIND CURIOUS STONEIMPLEMENTS 



A TRADE IN FLINTS AND MARINE PRODUCTIONS AT SOME REMOTE 

 PERIOD, AND A SKULL(viDE ILLUSTRATION) UNALTERED BY PRESSURE 



LEAVE WALLA- WALLA CROSS THE SNAKE RIVER PELOUSE 



INDIANS AND THEIR HORSES FALLS OF THE LOWER PELOUSE A 



DISAGREEABLE INTRUDER PLEASANT TO SEE TREES AGAIN SAND- 

 FLIES BREEZE-FLIES CLARK'S CROW THE SPOKAN RIVER 



WALKER'S PRAIRIE PARRY'S GROUND-SQUIRREL THE WAY THE 

 THREE SPECIES OF GROUND-SQUIRRELS REPLACE EACH OTHER ON 

 THE PLAIN PARKMAN'S WREN AND ITS NEST NUTHATCHES THE 

 TITS DEAD MAN'S PRAIRIE ARRIVE AT FORT COLVILLE. 



THE great plain of the Columbia over which we 

 are travelling, though its name gives the impres- 

 sion of a uniformly level surface, has, nevertheless, 

 its mountains and valleys. Its northern boundary 

 is an irregular line between the parallels of 48 

 and 49; southward it merges into and is con- 

 tinuous with the central plains of Oregon, and 

 thence extends to Salt Lake City, in Utah Terri- 

 tory. 



The vegetation indicates a much drier climate 

 than that of the western side of the Cascades. 



H 2 



