idealism in the face of oppression. The Epilogue, spoken by Demogorgon, expresses Shelley's tenets as a poet and as a revolutionary: To suffer woes which Hope thinks infinite; To forgive wrongs darker than death or night; To defy Power, which seems omnipotent; To love, and bear; to hope till Hope creates From its own wreck the thing it contemplates; Neither to change, nor falter, nor repent; This, like thy glory, Titan, is to be Good, great and joyous, beautiful and free; This is alone Life, Joy, Empire, and Victory. Shelley's Prometheus Unbound responds to the revolutions and economic changes affecting his society, and the old views of good and evil needed to change to accommodate the current civilisation. Technical aspects Later editing Shelley continued working on the play until his death on 8 July 1822. After his death, his father Timothy Shelley refused to allow Mary Shelley to publish any of Shelley's poems, which kept any immediate corrected editions of the play from being printed. Although reluctant to help the Parisian publishers A. and W. Galignani with an edition of Shelley's works, she eventually sent an "Errata" in January 1829. The Galignanis relied on most of her punctuation changes, but only a few of her spelling changes. The next critical edition was not released until 1839, when Mary Shelley produced her own edition of Shelley's work for Edward Moxon. Included with the edition were Mary Shelley's notes on the production and history of Prometheus Unbound. Before his death, Shelley completed many corrections to a manuscript edition of his work, but many of these changes were not carried over into Mary Shelley's edition. William Rossetti, in his 1870 edition, questioned Mary Shelley's efforts: "Mrs. Shelley brought deep affection and unmeasured enthusiasm to the task of editing her husband's works. But ill health and the pain of reminiscence curtailed her editorial labours: besides which, to judge from the result, you would say that Mrs. Shelley was not one of the persons to whome the gift of consistent accuracy has been imparted". Later, Charles Locock, in his 1911 edition of Shelley's works, speculated: "May we suppose that Mrs. Shelley never made use of that particular list at all? that what she did use was a preliminary list, – the list which Shelley "hoped to despatch in a day or two" (10 November 1820) – not the "formidable list"... which may in the course