Macquarie Field House estate was closely associated with the alignment chosen for the Great Southern Railway Line. The then owner of Macquarie Fields House, John Hoskings Jr, (first Mayor of Sydney) was a member of the Liverpool Committee making recommendations on the route for the new southern railway line in the 1850s. The line to Campbelltown was opened in 1858 and Macquarie Fields formed a significant part of the attractive scenery along the route, described as including elegant cottages and substantial homesteads. In 1862 the line was extended to Menangle, and in 1869 a railway platform (later Ingleburn station) was opened on the Macquarie Fields estate. As a stimulant to regional development, carrier of pupils to the school on site from 1858 to 1869, and commuters since 1858, the views from the railway line are of key importance to the understanding and presentation of this property, and its importance in association with the property, and in determining an appropriate curtilage and defining key views, can not be overlooked.
