Basil Roberts and James Hopper, both 12 years old, go to school when in session and work at Coleman Bros. Zinc Mine, Aurora, Mo., Saturdays and holidays, culling "waste" from the zinc ore on the "dumps." Their fathers work in zinc mines nearby. These boys told me no boys were permitted to work down in the mines, and said they were the only boys working in the vicinity; which seemed to be about true. Location: Aurora, Missouri.