Steele Point was resumed at this time to build a battery. The battery, designed by James Barnet, is of sandstone construction and is made up of a series of gun pits with connecting trenches and tunnels. A timber cottage near to the portal entrance of the Battery was built in 1880 as a two-roomed Gunners' Barracks. A store shed, which was likely used for early storage of artillery, and later vehicle storage, was also built in the 1880s. In 1942, of the broader site was occupied by the Army as Sydney Harbour's anti-aircraft defences. A light AA gun was placed at Steele Point, air raid shelters were built and the 61st Anti-Aircraft Searchlight Company (an all-women unit) occupied the area between the Gardeners Cottage and the avenue of small fig trees to its south. A brick emplacement was constructed at Bottle and Glass Point for use by volunteer 15–16-year-old boys of the Marine Bomb Spotting Squad. Resumption and establishment of Nielsen Park The Harbour Foreshores Vigilance Committee, with William Notting as secretary, formed in 1905 to secure parks on Harbour foreshores for public use. William Notting was a tireless campaigner against the alienation of Harbour foreshore lands and had been agitating for the resumption of land at Parsley Bay since 1900. Notting was a keen sailor who urged that "steps must be taken to prevent Sydney Harbour becoming a private lake, commenting that it is little better than a pond in a privately owned paddock". The Committee played a significant role in the emergence of a public movement to protect the remaining natural foreshores of the Harbour. As a result, the Foreshore Resumptions Scheme was established in 1911 and Nielsen Park was created and named in honour of the Minister for Lands Mr. Niels R W Nielsen, the Secretary for Lands. The Hermitage Foreshore Reserve and Strickland House were also reclaimed at this time. The newly created Nielsen Park Reserve was a total of 51 acres of land and it included: Shark Beach, Bottle and Glass Point and the W C Wentworth Trustee's land around Mount Trefle as well as a parcel of land belonging to George Donaldson containing a house and stables at the summit of Mount Trefle. Greycliffe was not included in the first resumption. The public praised the resumption of part of the foreshore but pressed for the acquisition of Greycliffe. In 1911, the Greycliffe Estate was