David Cameron told me that he came across a NSW NPWS Heritage Report on the Glenrock Recreation Area, which is located a few miles south of Shepherd's Hill Battery. The report noted 'defence remains' at a site on Little Redhead Point. The report noted the remains of what is believed to be corrugated iron lined trenches, a machine gun nest and ammo storage dump (in a cave!).

Fort Redhead is the site of the southern of four Forward Observation Posts (F.O.P.) for Newcastle.

Apparently there used to be some important coal mines nearby and at Glenrock Lagoon.  It may have been considered a possible amphibious landing zone for the Japanese.