For 10 points, name this figure depicted by John William Waterhouse and many other Pre-Raphaelites, a woman whose love for Lancelot causes her to die of grief on a barge.
One painting of this name includes an image of Heracles in the garden of the Hesperides, and depicts the central figure surrounded by twisting threads. In a painting by Sidney Meteyard, a crystal ball appears behind this figure, who is clad in blue. John La Farge painted the dead body of this figure, who stands in front of a cracked mirror in a painting by William Holman Hunt. In another painting, this woman holds a chain and sits on a tapestry dipping into the water, and wears a white dress which contrasts with her red hair. For 10 points, name this figure depicted by John William Waterhouse and many other Pre-Raphaelites, a woman whose love for Lancelot causes her to die of grief on a barge.
One painting of this name includes an image of Heracles in the garden of the Hesperides, and depicts the central figure surrounded by twisting threads.
The Lady of Shalott [prompt on "Elaine"]