Hand-tinted plans and sections of the latrines, urinals and ball court, a work shop, the barrack sergeants wash house and an armourers shop in Grand Shaft Barracks at Western Heights. For each of the four buildings there is a plan and two sections. The drawings include some measurements and notes about construction. The original plan was drawn up on 1st March 1867. There are later amendments indication improvements and new structures in red pen (31st Oct 1906) and pencil (undated).