The cache is not within the bounds of any private property. Please do not trespass.
In the early 1960s the Mater Hospital was to a large extent financed by lotteries of specially built houses known as Mater Homes. Many of the houses on the hill to the south of the cache were originally Mater Homes. As they were obtained for the cost of a lottery ticket, in those days two shillings or two bob (20 cents), the locals called the area "Two Bob Hill". None of the houses visible from the cache were Mater Homes.
The cache is disguised as something quite different.