Jean-Édouard Vuillard was believed to have three muses throughout his artistic career — his mother, and two fascinating patrons, Misia Natanson and Lucy Hessel, whose intimate involvement and support for the...

You see a little dark-skinned boy, barely out of diapers, but his face is as wary of the camera as a 40-year-old man. Turning your head to the side, you catch a glimpse of the dour-faced...