Barbara Hepworth’s Three Oblique Forms (Walk In) (1968) will lead Christie’s Modern British and Irish Art evening sale in London on October 18. Standing at almost three metres in height it is one of a rare and highly important group of monumental sculptures created by Barbara Hepworth in the 1960’s. They were intended to be set in open-air surroundings and make a new understanding of landscape. Three Oblique Forms (Walk In) is on view in the garden setting of St James’s Square, adjacent to Christie’s headquarters on London’s King Street, until October 18, a unique opportunity to enjoy the work in a public outdoor space accessible to all. The piece is estimated at £6,000,000-9,000,000.