Orielton is a heritage-listed former hunting, pleasure garden, farming estate, weekender, cereal cropping, flour mill and pastoral property and now horse agistment and residence located at 181 - 183 Northern Road in the south-western Sydney suburb of Harrington Park in the Camden Council local government area of New South Wales, Australia. It was designed and built from 1815 to 1834. It is also known as Orielton Farm and Orielton Homestead. The property is privately owned. It was added to the New South Wales State Heritage Register on 22 December 2006. History Early Colonial history Edward Lord was granted in the Parish of Narellan that he then named Orielton Park in about 1815. He established a Tasmanian property and this Camden (Cowpastures) property from 1814. His principal residence was in Tasmania. Initial occupation at Camden/Narellan probably included siting a shelter to take in the sublime prospect afforded by the current location of the house. Timber-getting for fuel and fencing and clearing of land for cropping were establishment processes of this time. The initial landscape was probably open forest with grass understorey. Lord's grant included extensive alluvial flats along Narellan Creek and these were probably soon put to cultivation for cereal and hay production. Orielton was used from 1822 to 1841 as an outstation by John Dickson. James Dickson (John's brother) lived at Nonorrah (now Maryland) to the north and managed both properties. Agricultural use of Orielton from the 1828 census showed cattle and sheep stocked on Dickson's properties and he cultivated land for cropping, growing cereal (wheat and barley) for milling in his mills. Dickson would probably have sited (probably the confirmed (later) house site) the main residence (manager's house) to provide an outlook and surveillance over the estate. He was using Orielton for cereal production and dairy cheese-making and built barns and operated threshing and winnowing machinery. The Australian Auction Company described Orielton estate as having a substantial built brick cottage, commodious stabling, an excellent built barn with two floors, containing therein 8 horse-power threshing and winnowing machine'. This was probably built . In 1834, fifty men were working on the farm at Orielton - there would have been extensive quarters. The steam mill (three storeys high) was constructed in this period, possibly by Dickson, but most likely by the trustees. In 1834 Orielton was noted in letters written by David Waugh as being a productive farm. By 1835, of