In 1907, Sir Henry Marcus Clark, a well known businessman purchased 212 acres of land on the Hornsby highland, reputed to be the highest point in the Sydney metropolitan area. Over a few years he designed and began building the manor house, on the land that is next door to where Mt Wilga Private Hospital is presently located. The land and house have heritage significance to the Hornsby Shire and both are listed as a National Trust Property. Marcus Clarke named the property ‘Mount Wilga’ after the Wilga tree which was evergreen and could survive long periods of drought. He died in 1913, and didn’t live to see the completed house, which was finished by his wife, Georgina in
