Grain Fort

Grain Fort was constructed between 1861–68 to a heptagonal design. It initially had thirteen open emplacements carried on an earthwork, under which lay the magazines and linking passages. A semi-circular brick keep on a north–south alignment stood at the centre of the fort. It provided barrack accommodation for the garrison and was designed to be defensible, with loopholes in its front face to facilitate musket fire. Similarly, its gorge at the rear, where the main entrance stood, had crenelations to provide protection for defenders faced with a rearward attack. In front of the keep was a ditch, accessed via a gate at the rear of the fort. It had four caponiers that guarded the angles and…