James McNeill Whistler an Evolution of Painting from the Old Masters: Identified By Two Missing MasterpiecesThe discovery of this masterpiece Whistlers Portrait of William Merritt Chase, along with another important Whistler painting, Harmony in Black, No10, reveals exciting new discoveries on Whistlers artistic methods, from the Old Masters and the artistic truisms of the Renaissance. Documented analysis including x ray examination, forensics and recognized paintings by Whistlers followers will confirm this portrait and Harmony in Black, No10, with x ray