" Not settles herself in the farthest reaches of the gallery, admiring the work of an artist she hasn't seen before. The canvases are large and dark, great splashes of royal blue on black, what appear to be deep purple seas beneath deep red skies. They remind her of Turner's tranquil sunsets, with a slightly sinister edge, as if sharks swim in the purple seas and black crows caw through the red skies. "

― Menna van Praag , The Witches of Cambridge