within the NSW prison system, replacing the intractable section at Grafton Gaol. It was dubbed as an ‘electronic zoo' by inmates due to its electronically controlled confinement with artificial lights and air, depriving inmates from almost all contact from the outside world. The facility with its 40 prison cells had electronically operated doors, accompanied by several surveillance cameras, which were to supplement the existent security facilities within the unit. Although the unit did not have windows, it was serviced by a fully integrated air-conditioning system which circulated fresh air throughout. Additionally, inmates were permitted to engage in physical exercise in two purpose-built yards situated at each end of the unit. Several 'blind spots' that were not corrected during the initial design and construction of the facility led to escapes by inmates, including Russell 'Mad Dog' Cox, an armed robber and hostage-taker, who escaped after cutting through a bar on the roof of one of the exercise yards. The facility became the centre of mainly critical media attention, and was heavily criticised by Justice John Nagle during proceedings of the Nagle Royal Commission (1976–1978) who recommended its immediate closure. The recommendation that Katingal be closed was accepted, but only after a campaign lasting months. On 17 March 1989 Michael Yabsley, Minister for Corrective Services, announced that Katingal would be reopened as a correctional facility. When it was realised that the redevelopment of the site would cost double the 8 million allocated, plans were put on hold until a feasibility study was completed on the entire Long Bay prison complex. Demolition of Katingal began in March 2006. Description Male Penitentiary: The former Male Penitentiary comprised 6 two-storey cell wings, a debtors' prison, workshop, hospital and observation ward, all arranged around three sides of the complex with a "sterile zone" between them and the perimeter wall. The kitchen block stood in the centre facing the entrance block. The Penitentiary incorporated 352 single cells of size 3.96x2.13m and 3 punishment cells. Four of the six wings had back-to-back cells opening directly to the outdoors. The same palette of materials was used by Vernon throughout the dual prison establishment. Walls are predominantly of brick, good quality "commons" of a drab brown colour, with plain or rusticated sandstone dressing around windows and doors, and roofs of corrugated iron. Entrance Block: The exception is the entrance block which evokes a medieval castle gatehouse in Federation Gothic style.