A jewel in the crown of the dramatically named Fremantle Coastal Defence Fortress was the two 9.2 inch naval guns, H1 and H2 situated at Oliver Hill on Rottnest Island (Wadjemup). These guns were originally intended to be emplaced at Mosman Park on the mainland but this position wouldn’t prevent the bombardment of Fremantle by enemy warships, therefore they had to be placed further out to sea. The gun pictured here (H1) weighs 30 tonnes and before finding its way to Western Australia it was originally supplied to the Royal Navy for fleet use in Hong Kong.
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