wall separating the new and old sections of the gaol and the construction of various workshops, a cookhouse and extra cells in existing wings, as well as the installation of new utilities including underground water tanks. Three further extensions of the gaol perimeter wall were carried out during the last quarter of the nineteenth century. Within the new enclosure, three cell wings were slowly built between 1883 and 1889, largely with prison labour. Owing to overcrowding of the observation ward at Darlinghurst Gaol part of one of these wings was set aside for prisoners who had been deemed insane. In 1899, a 32 unit radial exercise yard was constructed in the space formed on three sides by the recently constructed wings. At this time the cells were also converted from associated cells to single cells, under the influence of comptroller general, William Frederick Neitenstein. The period from the end of the nineteenth century to WWI was devoted to the improvement of auxiliary facilities – industrial, spiritual and hygienic. In 1906 – 1908, a chapel was constructed within the prison walls while sewerage and ablutions blocks were upgraded. Due to declining entries into the penal system, the gaol was disestablished on 15 September 1918 and the property given over to the inspector of mental hospitals. At this time the western sandstone perimeter walls were demolished and much of the equipment and internal fittings removed. By 1927 however, with an increase in demand on the system, the gaol was rehabilitated and was re-established in 1927. Notably, this rehabilitation involved the conversion of the single cells back to associated cells. Parramatta became a centre for re-training and rehabilitation. The 1940s began a period of official mistreatment of nineteenth century institutional establishments and a number of unsympathetic buildings were approved for construction. In the 1970s, the Parramatta Linen Service, a large auditorium and an extension to the gatehouse were built. This period also saw the opening of periodic detention centres for males and females. A new development scheme completed in 1993 included a pedestrian and large vehicle entry off Dunlop Street and new adjacent buildings for reception, administration and visiting facilities. These new designs attempted to match the form and scale of the original precinct, with hipped roofs and bricks which complemented the sandstone. The centre closed briefly between 3 September 1997 and 1998. In 2004, there were calls for the centre to be