Whistlejacket is an oil-on-canvas painting from about 1762 showing the Marquess of Rockingham's racehorse, rearing up… https://www.rawpixel.com/image/7666008/image-horse-painting-george-stubbsFree Image from public domain licenseWhistlejacket artwork by George Stubbs at The National Gallery, London, UK - unknown date https://www.rawpixel.com/image/6111744/photo-image-public-domain-art-personFree Image from public domain licenseWhistlejacket artwork by George Stubbs at The National Gallery, London, UK - unknown date https://www.rawpixel.com/image/6111425/photo-image-public-domain-art-personFree Image from public domain license