In the final hours of his life, a 37-year-old Vincent Van Gogh set up his easel beside a tangled slope of roots and painted with furious intensity. The result - Tree Roots (1890)- was a chaotic burst of colour and form, interpreted by many as a visual cry from a mind in anguish.
It is widely believed to be his last work before he shot himself in a nearby wheat field later that same day.
