Whistlejacket is an oil painting on canvas completed by the British Artist George Stubbs in c. 1762. It shows the Marquess of Rockingham's racehorse approximately at lifesize and in considerable detail, rising to a levade against a plain background. The composition was unprecedented at the time and the painting received popular acclaim. The painting was held by the Fitzwilliam family until 1997, when it was purchased by the National Gallery, London.Painting: George Stubbs; edit: Chris Woodrich