Mario Paz has, in the Romantic Agony, acutely analyzed the effect of the traditions of Byron and De Sade upon poets and painters from 1800 to 1900. It is the analysis of a mood in literature. The mood may ve been transient, but it was widespread, and it was expressed in dreams of "luxurious cruelties," "fatal women," corpse-passions, and the sinful agonies of delight. Professo Praz has described the whole Romantic literature under one of its most characteristic aspects, that of erotic sensibility.