Detail of chart showing Sow and Pigs Reef and lightship 1881 From the collections of the State Library of New South Wales [Z/M2 811.15/1881/1 (detail)] (Detail of 'Mossmans Ferry: showing course taken by steamer and various roads to Pearl Bay, Spit and Balmoral, Middle Harbour ; Georges and Bradleys Head ; Curraghbeenia Point & c')