During the afternoon he took Neal and Dol with him into a grove of poplars and birches which bordered one end of the clearing, leaving Cyrus lounging by the camp-fire. Here the woodsman began the exciting work of preparing his birch-bark horn, that primitive but potent trumpet through which he would sigh, groan, grunt, and roar, imitating each varying mood of the cow-moose. To her call he had often listened as he lay for hours on a mossy bed in the far depths of the forest, learning to interpret the language of every woodland creature.