was granted another bringing the Vaucluse Estate to . Previously part of the Wentworth Estate, the area which became Nielsen Park was once owned by William Wentworth. It was disused since 1898 after the death of Wentworth's last surviving unmarried daughter Eliza Sophia Wentworth, at a time when little of Sydney Harbour's foreshore was accessible to the public. From the 1890s, pressure built to buy back private land, and following agitation by the Harbor Foreshores Vigilance Committee (sic), the New South Wales Government took control of of the Vaucluse estate on 6 July 1910. Known as Vaucluse Park, it was soon renamed Nielsen Park in honour of The Hon. Niels Nielsen, the Secretary for Lands from 1910 to 1911, once an additional were added in 1911. The historic 1851 residence Greycliffe House lies within its grounds, and after 1911 served as a neonatal hospital and mothercraft residence before its eventual function as an office for the NSW National Parks and Wildlife Service and visitors centre for the Sydney Harbour National Park. Nielsen Park is part of the traditional land of the Eora or Birrabirragal people. Shell middens lie on the walk west of Nielsen Park towards Rose Bay. The Vaucluse Estate William Charles Wentworth, explorer, author, barrister, landowner, and statesman was born to Catherine Crowley, a convict and D'Arcy Wentworth. William Wentworth, Gregory Blaxland, and William Lawson are credited with making the first major colonial exploration by crossing the Blue Mountains in 1813. As a reward he was granted in addition to an earlier grant of on the Nepean River. Wentworth travelled to England in 1816 to study law and became an advocate for political reform in NSW. Together with Robert Wardell, Wentworth founded The Australian newspaper. After his father's death in 1827 William Charles gradually purchased land on Sydney Harbour which he combined to create his Vaucluse Estate. The estate included the land from the Macquarie Lighthouse on South Head to the eastern heights of Rose Bay, with the land currently known as Nielsen Park forming a part. The focal point of the estate was Vaucluse House that he built for his family. William and his wife Sarah had seven daughters and three sons. The Greycliffe Estate In 1847, one of William Charles Wentworth's daughters, Fanny Katherine Wentworth (1829–1893), married John Reeve, a wealthy pastoralist from Gippsland. In 1850 Reeve purchased 14 acres of the Vaucluse Estate fronting Shark