Various methods of torture were used to control and punish the slaves. One such method was "the box", also known as a hot box or sweatbox, is a method of solitary confinement used in humid and arid regions as a method of punishment. Anyone placed in one would experience extreme heat, dehydration, heat exhaustion, even death, depending on when and how long one was kept in one. Another variation of this punishment is known as sweating: the use of a heated room to punish or coerce a person into cooperating with the torturers.
part 4 (video)