Experiment Farm Cottage, in Harris Park, New South Wales, Australia, is one of Australia’s oldest standing residences. It is located at the site of Experiment Farm, Australia's first European farmstead, which was itself created by Australia's first land grant. In October 1793, Ruse sold his farm to surgeon John Harris, builder of the substantial colonial cottage which exists today. Doctor Harris was a prominent citizen in the rapidly emerging colony, and was also friends with John and Elizabeth MacArthur of Elizabeth Farm, another celebrated early agricultural venture only a short walk away.