He worked on a "shovel brigade" at the McNabb furnace and described the music made by the workers as they beat shovels, altering the tone while thrusting and withdrawing the metal part against the iron buggies to pass the time while waiting for the overfilled furnace to digest its ore. He called the sound "better to us than the music of a martial drum corps, and our rhythms were far more complicated." He wrote, "Southern Negroes sang about everything...They accompany themselves on anything from which they can extract a musical sound or rhythmical effect." He would later reflect, "In this way, and from these materials, they set the mood for what we now call Blues".