A 9.2-inch howitzer of the Royal Garrison Artillery 'walking' its shells on top of a German blockhouse, Western Front, January 1916.
The howitzer is in a leafless wood. Its crew remove its camouflage, load the howitzer and elevate it (this is the number 4 gun of the battery). They uncover a pile of shells and roll them forward ready to be lifted up by special tongs. The howitzer fires, then is sponged out and reloaded three times. Another camera in a hide a short distance away from a German blockhouse records through a loophole the shells falling nearer to the target. Two officers in their Observation Post use trench periscopes to spot the fall of shot, and send a message via a field telephone to an RGA sergeant-trumpeter, who relays it to a second-lieutenant. Four more shells burst around the blockhouse, and the eighth shell fired scores a direct hit destroying the building. The gunners clean out their gun and do maintenance work before re-covering it with camouflage.