This one is an art episode, but also a murder episode and also a madness episode. Artist Richard Dadd's life story is quite sad, but his art remained consistently good, even at the lowest points in his life.
Research:

Gustave Flaubert and the ‘Madame Bovary’ Trial
45:15

Elizabeth Bisland, Beyond the Trip Around the World
42:54

SYMHC Classics: Marie Laurencin
32:46