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            [Fort 
            Hughes, Caballo Island.] 
              
            
            Two 12-inch 
            Mortar M1912 on 12-inch Mortar Carriage M1896M3.  
             Originally, 
            Battery Craighill was  intended to be two semi-independent 
            batteries,  but became Pit A and Pit B. At the rear of Pit A 
            are the Battery Plotting Rooms. 
            
             
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