J.m. Northup said this quote

Sam heard someone bellow in the distance, but the sound of freight trains running in his ears dampened the sound, making it impossible for him to locate the source of the cry. When he heard it sound again, closer, the voice sounded familiar somehow. He strained to listen past the thundering racket in his ears, only to be rewarded by another holler from the voice. This time, he recognized the voice as his own.