He is pictured from the knees up, sitting on a stool in front of a brick wall. He is wearing a hat in the side profile shot. Back of the photo reads 'Billy S.A. c1904 5' 6" '. According to T. Gara, Billy is part of a group of men from Northern and Central Australia, accused of being Cattle Killers, brought down to Port Augusta Gaol around 1910 (T. Gara 2-2020)
See also 42-46.