The ‘Bumpy’ Whistler That Hides A Portrait Of His Mistress

“They noticed bumps on the surface of The Last of Old Westminster, 1862, so MacDonald asked for an X-ray. What she found was ‘staggering’ — an entirely different composition, flipped sideways, of a young woman reading. ‘I immediately said, “It is Joanna. It is Joanna Hiffernan.”‘”