It was standing room only at the National Gallery in London when the newly discovered full-scale study of John Constable’s The Cornfield was placed side-by-side with the final version for the first time. Constable’s preparatory work, valued at $500,000 and headed to auction on June 5, had been hidden in plain sight on the walls … Continued The post How a $500,000 Masterpiece Was Discovered in an East Texas Courthouse appeared first on D Magazine.