'"The new 10 inch gun erected at Eagle's Nest was successfully tired Monday. Each discharge costs from £28 to £70"
Eagles Nest was once a highly significant part of Port Phillip's early defence system. Built in 1889 its 10-inch breech loading gun was the largest hydro-pneumatic gun in Australia. Its prominent location allowed a 270 degrees arc of fire. The gun had a range of 10,800 yards (9.9 kilometers) and a charge could penetrate armour up to 20.8 inches (53cm) thick. When 6-inch Mark VII Guns were introduced to Point Nepean in c.1911 this gun emplacement was abandoned.
Submitted by: @IanThorp