facilities as a means of assessing the National Heritage value of this material. The 1999 Interim Report provided specific conservation recommendations for the Wharf Area and The Old Mans Hat inscriptions, and general conservation management recommendations for visitor management and monitoring. These recommendations are included as recommendations of this Plan. The inscriptions are valuable and unusual graphic illustrations of historical incidents and social patterns of Quarantine Station history. They provide a very tangible and "human" link with the past for present generations and are a valuable historical and genealogical resource. Their research potential is enormous. The inscriptions record a variety of information which cannot be obtained from any other source, especially the feelings of non-English speaking migrants. Historical archaeological sites The 1998 North Head Quarantine Station Conservation Plan archaeological survey forms the current basis of assessment of areas within the active Quarantine Station area. That report diagrammatically indicated the historical archaeological sites and structures within or adjacent the North Head Quarantine Station core precinct. The 1991 North Head archaeological site survey forms the basis of the assessment of areas outside the active Quarantine Station area. That report indicated the following historical archaeological sites and structures within or adjacent the North Head Quarantine Station study area: the sandstone boundary wall leading from the North Head Road to Collins Beach; the sandstone boundary wall south-east of the Quarantine Station (Site No. L10); the Australian Institute of Police Management, incorporating parts of the venereal diseases hospital, the Second and Third Quarantine Cemeteries (Sites L1 and VA1); and the Old Mans Hat inscription area; and the Quarantine Head gun emplacement. All of these sites and structures are related to the history of the Quarantine Station, and are significant physical evidence of the development and contraction of quarantine functions over time. However, the vast majority of buildings and archaeological sites are located within the zone of most intensive quarantine activity, which is more or less contiguous with the current NPWS managed area of the Quarantine Station. The NPWS has carried out a number of historical archaeological surveys of areas of the Quarantine Station itself, though there has as yet been no systematic survey of the entire study area. These surveys have identified a large number of former building sites and other features, and has indicated where as yet unlocated building sites might be located. The site numbers beginning with "P" relate to "Potential Sites". Forty-eight