The visionary drama of Prometheus Unbound, which had haunted, yet eluded him so long, suddenly took life and shape, and stood before him, a vivid reality. During his first month at Rome he completed it in its original three-act form. The fourth act was an afterthought, and was added at a later date.

For a short, enchanted time—his health renewed, the deadening years forgotten, his susceptibilities sharpened, not paralysed, by recent grief—he gave himself up to the vision of the realisation of his life-dream; the disappearance of evil from the earth.

“He believed,” wrote Mary Shelley, “that mankind had only to will that there should be no evil, and there would be none.... That man should be so perfectionised as to be able to expel evil from his own nature, and from the greater part of the creation was the cardinal point of his system. And the subject he loved best to dwell on, was the image of one warring with the Evil Principle, oppressed not only by it, but by all, even the good, who were deluded into considering evil a necessary portion of humanity. A victim full of fortitude and hope, and the spirit of triumph emanating from a reliance in the ultimate omnipotence of good.”

“This poem,” he himself says, “was chiefly written upon the mountainous ruins of the Baths of Caracalla, among the flowers, glades, and thickets of odoriferous blossoming trees, which are extended in ever winding labyrinths upon its immense platforms and dizzy arches suspended in the air. The bright blue sky of Rome, and the effect of the vigorous awakening of spring in that divinest climate, and the new life with which it drenches the spirits even to intoxication, were the inspiration of this drama.”[34]

And while he wrought and wove the radiant web of his poem, Mary, excited to greatest enthusiasm by the treasures of sculpture at Rome, and infected by the atmosphere of art around her, took up again her favourite pursuit of drawing, which she had discontinued since going to Marlow, and worked at it many hours a day, sometimes all day. She was writing, too; a thoroughly congenial occupation, at once soothing and stimulating to her. She studied the Bible, with the keen fresh interest of one who comes new to it, and she read Livy and Montaigne.

Little William was thriving, and growing more interesting every day. His beauty and promise and angelic sweetness made him the pet and darling of all who knew him, while to his parents he was a perpetual source of ever fresh and increasing delight. And his mother looked forward to the birth in autumn of another little one who might, in some measure, fill the place of her lost Clara.

Clare, who, also, was in better health, was not behindhand in energy or industry. Music was her favourite pursuit; she took singing-lessons from a good master and worked hard.

They led a somewhat less secluded life than at Naples, and at the house of Signora Dionizi, a Roman painter and authoress (described by Mary Shelley as “very old, very miserly, and very mean”), Mary and Clare, at any rate, saw a little of Italian society. For this, however, Shelley did not care, nor was he attracted by any of the few English with whom he came in contact. Yet he felt his solitude. In April, when the strain of his work was over, his spirits drooped, as usual; and he longed then for some congenial distraction, some human help to bear the burden of life till the moment of weakness should have passed. But the fount of inspiration, the source of temporary elation and strength, had not been exhausted by Prometheus.

On the 22d of April Mary notes—

Visit the Palazzo Corunna, and see the picture of Beatrice Cenci.