6 September 1819, Shelley wrote to Charles and James Ollier to say, "My 'Prometheus,' which has been long finished, is now being transcribed, and will soon be forwarded to you for publication." The play was delayed in publication, because John Gisborne, whom Shelley trusted to go to England with the text, delayed his journey. It was not until December 1819 that the manuscript with the first three acts of Prometheus Unbound was sent to England. The fourth act was incomplete by this time, and on 23 December 1819, Shelley wrote to Gisborne, "I have just finished an additional act to 'Prometheus' which Mary is now transcribing, and which will be enclosed for your inspection before it is transmitted to the Bookseller." While in Italy, Shelley became concerned about the progress of publishing Prometheus Unbound. He wrote many letters to Charles Ollier from March until April asking about the drama's progress and wanted to know if the text was accurate because he was unable to check the proofs himself. Both Percy and Mary Shelley were eager to hear when the book was published, and inquired Gisborne's wife, Thomas Medwin, and John Keats about its release throughout July 1820. It was not until late August that they received word that the book was published. They were eager to read the published version and obtained one by November 1820. After they procured a copy, Shelley wrote to the Olliers on 10 November 1820: "Mr. Gisborne has sent me a copy of the 'Prometheus,' which is certainly most beautifully printed. It is to be regretted that the errors of the press are so numerous, and in many respects so destructive of the sense of a species of poetry which, I fear, even with this disadvantage, very few will understand or like." A corrected edition was sent on 20 January 1821 along with a letter from Shelley that explains "the Errata of 'Prometheus,' which I ought to have sent long since – a formidable list, as you will see". Shelley did not forget the printing errors, and even criticised Charles Ollier later when Shelley sent Adonaïs to be published. Æschylus Shelley's own introduction to the play explains his intentions behind the work and defends the artistic freedom he has taken in his adaptation of Aeschylus' myth: The "Prometheus Bound" of Æschylus supposed the reconciliation of Jupiter with his victim as the price of the disclosure