Middle Harbour
Middle Harbour has its source in the upper reaches of Garigal National Park where it forms Middle Harbour Creek and flows southeast to become Middle Harbour at Bungaroo and travels for approximately before reaching its mouth at Port Jackson between Grotto Point near Clontarf and Middle Head . 
<triplet> Middle Harbour <subj> Middle Harbour Creek <obj> tributary <triplet> Middle Harbour <subj> Middle Harbour Creek <obj> tributary