Although the American bison or buffalo has been virtually extinct for years, the animals were numbered by the hundred thousand on the western plains at the time we have in mind. The droves seen in the distance seemed often to cover a fourth of the horizon, and their dark, shaggy backs as they cropped the herbage and hitched continually forward, were like the fretted waves of the sea. Shagbark had shot a number, and twice he took Alden and Jethro with him on the excursions. A nearly fatal result to Alden followed the attempted slaying of an enormous bull by shooting him in the head instead of just behind the fore leg, but the mistake was not repeated. Jethro showed his natural timidity, and kept as close as he could to the veteran, while Alden indulged in spurts of his own which more than once brought results.