IV
Early in the spring I bad begun Bingo's education. Very shortly afterward he began mine.
Midway on the two-mile stretch of prairie that lay between our shanty and the village of Carberry, was the corner-stake of the farm; it was a stout post in a low mound of earth, and was visible from afar.
I soon noticed that Bingo never passed without minutely examining this mysterious post. Next I learned that it was also visited by the prairie wolves as well as by all the dogs in the neighborhood, and at length, with the aid of a telescope, I made a number of observations that helped me to an understanding of the matter and enabled me to enter more fully into Bingo's private life.
The post was by common agreement a registry of the canine tribes. Their exquisite sense of smell enabled each individual to tell at once by the track and trace what other had recently been at the post. When the snow came much
