tracks, fencing, bollards, tree guards, service roads and road barriers. Rare flora and fauna The last mainland eastern quoll specimen was collected as roadkill at Nielsen Park on 31 January 1963. The rare Nielsen Park she-oak was originally identified here in 1986 from ten specimens. Those original plants have since died. However, efforts to propagate and reintroduce the species began from the time it was identified, and plants were planted at several locations around Nielsen Park and nearby Gap Bluff and Hermit Point. Fifty-four of these remained alive in 2000. Heritage listing As at 13 December 2016, Nielsen Park is of state heritage significance as an outstanding natural and cultural landscape. The item demonstrates a rich and diverse range of uses spanning pre-European settlement to the present. The presence of Aboriginal art, shelters and middens across the site demonstrates pre-colonial use of the place as a fishing and camping ground for the local Aboriginal people and signifies the ongoing connection of the place to the Birrabirragal People. Its use as a private residential estate by noted colonial family of William Wentworth is demonstrated by Greycliffe House, its surviving outbuildings, landscaped setting and historic harbour view lines which are rare in consideration of their intactness. Greycliffe House is an outstanding example of John F. Hilly's architectural design and is one of a suite of neighbouring Hilly residences in the immediate vicinity including Strickland House. Use of Greycliffe House as a health facility for infants and babies, firstly as Lady Edeline Hospital for Babies from 1914-1934, and, later, as the Tresillian Mothercraft Training School from 1934-1968 is of historic significance. The history of these institutions exhibit the evolution of philosophies and methods of treating infant patients and their mothers which can be demonstrated in the various alterations and additions to the buildings and landscape from this period. Works such as Margaret Harper House (1939), and the parterre garden, designed by long-serving matron, Matron Kaibel, in the 1930s, contribute to the layering of significance in the setting. The park is also historically significant in its several phases of use for defensive activities. The Steele Point fortification complex is representative of a group of 1870s harbour side fortifications. Steele Point Battery and its associated outbuildings, together with the potential archaeological deposits relating to use of the site in two world wars demonstrates the strategic importance of the location to Australia's defence forces since the