“Quarry” — These photographic images are shot on a pitch-black night using magnesium explosives as the sole light source. This quarry is lit by a mortar charge that detonates 1,000 feet in the air in a short burst of pure white light.
Also lit by a mortar is Duckett's Grove House. This structure no longer has a roof and therefore the light illuminates the internal as well as external walls.
A raft carries a magnesium “waterfall” charge downriver to Milford Bridge, the fuse being timed to ignite the explosives just before passing under the bridge.
Duckett's Grove House again but this time at a distance. The surrounding moat, now dry, concealed another set of waterfall charges.