Her last written words were reportedly, “I joyfully await the exit, and I hope never to return.” These words, found in her diary, were accompanied by drawings of skeletons and angels. Her last drawing is that of a black angel, which some biographers claim is a caricature of the Angel of Death.

Some suspect the artist actually died of a suicide from overdosing. The suicide theory is further fueled by a diary entry she wrote in which she confessed frustration over her deteriorating health, punctuated with a drawing of a black angel.