L38 INDIANS Ol l HE PLAINS 



Blackfoot, Gros Ventre, Dakota, and Mandan are said 

 to have known some of the ( "row language which was in 

 consequence often \i^><\ by traders. This, if true, was 

 no doubt due to the peculiar geographical position of 

 the ('row. The sign language, however, could be 

 used among all tribes familiar with it and must, there- 

 fore, be considered one of the striking peculiar traits of 

 the Plains and an important factor in the diffusion of 

 culture. 





