1913  . . . Mistisi, responding to the cry of "chaw," swerved into the . . . underbrush.
1953  . . . the people in this country [Great Bear Lake] use the expressions "hew" and "chaw" to signal a turn to right and left. Most of the time, their dogs pay no attention to them anyway.
1986  (1898)  Hu and chac, anglicized to "you" and "chaw" are words necessary to turn the foregoer to the right or left.