A store for gunpowder and ammunition. These have many anti-spark devices to prevent any explosions. Hoists are made with wooden parts. Ventilation shutters are staggered so as to stop any sparks reaching the gunpowder. These are found near barracks, ranges and quarries. They may be partly underground to minimise the effects of an accidental explosion. An example at Berwick upon Tweed dates to the 1740s AD.