In 1901 Sir John Quick and Robert Garran published Annotated Constitution of the Australian Commonwealth. This authoritative work is regularly referred to by High Court of Australia judges and constitutional experts when interpreting the Australian Constitution.
Both Quick and Garran participated in the Federation conventions in the 1890s and were involved in the drafting of the Constitution. Their book gives an historical introduction to the Constitution, its original text (before it was changed by referendum) and an extensive commentary on the political, historical and legal aspects of the Constitution.
It is the role of the High Court to interpret the Constitution. They do this by hearing cases. The judges use the arguments of the opposing counsel (lawyers), decisions made in previous cases and a variety of written sources, including Quick and Garran’s Annotated Constitution, to make their judgements.