title: Highbury
context: John Dawes, a wealthy stockbroker, acquired the site of Jack Straw’s Castle together with 247 acres (1.00km2) of surrounding land. In 1781 he built Highbury House at a cost of £10,000 on the spot where Highbury Manor had stood. Over the next 30 years the house was extended by new owners, firstly Alexander Aubert and then John Bentley, to include a large observatory and lavish gardens.
question: How big is the Highbury residence?
answers: 247 acres