bypassed in March 1989, with tourists finding it an easy day trip from either Sydney or Canberra to enjoy the town square and the Georgian architecture of this historic town. Berrima is the last Southern Highlands town that the Hume Highway passes. Marulan The Marulan bypass was opened in 1986. The southern part of Governor Lachlan Macquarie's road of 1819 ran from Sutton Forest roughly along existing minor roads through what is now Penrose State Forest to Canyonleigh, Brayton, Carrick and Towrang, where it joined the current route to Goulburn. Branching from this route (now part of the Illawarra Highway) just west of Sutton Forest, a road, now known as Old Argyle Road, developed in the 1820s. It ran to Bungonia, via Wingello, Tallong, and the southern outskirts of Marulan. Marulan lies on the 150th meridian east. When Thomas Mitchell rerouted the Great South Road in the 1830s, he decided to bring these two roads together to meet at old Marulan, with roads proceeding west to Goulburn and south to Bungonia. When the railway reached Marulan in 1868, the town migrated 3 km north to the railway station. Nevertheless, the old cemetery remains at the Bungonia Road intersection. A quarry is about to be developed near the intersection, so an interchange has been built. It is at this point that the highway climbs the Marulan Ramp, which is part of the divide between the Shoalhaven and Wollondilly River systems. Towrang Stockade Towrang Creek was the site of a major stockade for chain-bound convicts and others involved in the construction of the Great South Road. The stockade was located on the western side of the highway and was used from around 1836 to 1842. The stockade became the principal penal establishment in the southern district and was noted for its harsh discipline. There were usually at least 250 convicts stationed there. They slept on bare boards with a blanket apiece, 10 men to a box or cell. One of the two official floggers was later found murdered. The stockade used to be accessible by a stile, but this has been taken down to discourage use of the once daunting intersection of the Highway with Towrang Road. There are the remains of the powder magazine next to the Wollondilly River, three graves on the north bank of Towrang Creek, and the remains of a weir on Towrang Creek built for the stockade.