visited or if stabilising vegetation, especially grasses, is removed. There has been natural weathering and corrosion of sandstone headstones and wooden cross grave markers. Uncontrolled public access to these cemeteries, especially the Third, can result in vandalism or theft of remaining headstones and grave markers. Some headstones from the First and Second cemeteries are now located in the artefact store within Building A20. Further research is required to relocate obscured graves. The cemeteries are powerful reminders of the purpose of the Quarantine Station, its successes and failures and of its internees. They have historical, archaeological, genealogical and educational significance and special significance for descendants of those interred in them. An archaeological assessment of the North Head Quarantine Station cemeteries; and an archaeological inspection report of the Third Quarantine Station cemetery have been prepared by the NPWS. These documents provide specific policy recommendations related to the conservation and management of the cemeteries, which are accepted as recommendations of this Conservation Management Plan. This is a marble and sandstone monument which stands on the ridge above the 3rd Class Precinct. It commemorates the quarantining of the ship Constitution and its passengers and crew in 1855 and the reunion of surviving passengers and crew at the Quarantine Station 50 years later. It is in fair condition and requires some stonework and plaque repairs. It is symbolic of the events associated with, and the esprit de corps of, one ship's passengers and crew. Like the inscriptions in the Wharf precinct, it is one of the more obvious memorialising features in the Station landscape. Fences and walls The Quarantine Station study area landscape includes a variety of fences and walls which are integral to the history and past functioning of the place. Fencing, generally paling fences, was the primary means of enforcing the separation of different groups of internees at the Quarantine Station. The impact of the fences, and clearing of bushland, on the appearance of the Station can be judged from historic photographs. The loss of the majority of fences creates a false impression of the Quarantine Station's layout and reduces the ability to experience the segregation that passengers were required to maintain. In this sense the cultural landscape significance of the fences has been lost, but could be regained by reconstruction. These include: prominent sandstone block, barrier walls, built in the 1930s Great Depression by workers on unemployment relief programs. These are located