254 ON THE DEFENCES OF PORT JACKSON, 



A Fort on George Head to be used as Head-quarters on the 

 North Shore, with secure shot and shell proof barracks for 150 

 men, stores and magazine, towards Chowder Bay. The offensive 

 and defensive work to consist of one 600-pounder Armstrong rifled 

 shunt gun, under a non-revolving cupola, placed on the extreme 

 height, the rock being sloped for depression. 



Two 300-pounder Armstrong rifled shunt guns in an iron 

 " batterie blindee," about 50 feet below the crest, and four 150- 

 pounder Armstrong rifled shunt guns below the last, in four 

 connected wells, with iron-plated shields and roofs. All these 

 works are to be connected by covered ways and surrounded by a 

 ditch and loop-hole wall. 



A Fort on Green Point, consisting of a " batterie blindee " 

 for two 150-pounder Armstrong rifled shunt guns, surmounted by 

 a cupola (non-revolving) for one 300-pounder Armstrong rifled 

 shunt gun. 



Within a bastionette adjoining, on the Watsons Bay side, 

 shot and shell proof barracks for 50 men to be constructed so as 

 to render this work a secondary head-quarters. 



A " batterie blindee" on Middle Head, situate on the extreme 

 height, between the " Hut" and the north point of Middle Head. 

 This battery to hold one or two 150-pounders, brought from 

 George Head when necessary to engage an enemy. Proper sling 

 waggons to be provided. Turn-tables, traversing platforms, and 

 gun carriages, to remain in the battery. The guns to be kept 

 mounted in this work in war-time only, in charge of a detachment 

 from head-quarters on George Head. 



Modifying the unfinished battery on Middle Head, so as to 

 mount one or two heavy guns (up to 7 tons) taken there when 

 necessary. The details of the works are similar to those for Point 

 Piper, explained below. 



A " batterie blindee" on the highest point of South Head, 

 between Gap Bluff and the Inner South Head lighthouse. This 

 battery to contain one 150-pounder, to be taken there by a detach- 

 ment from Green Point in time of war, and in other respects to 

 be similar to the "batterie blindee" on Middle Head. 



A " batterie blindee" for two guns on Shark Point, similar 

 to that on Inner South Head. 



A " batterie blindee" on Bradley Head for one 300-pounder 



