Protestant Cemetery, Rome in the manuscript of "Adonais," the elegy Shelley had written the year before upon the death of Keats, in which the poet urges the traveler, "Go thou to Rome ...". Shelley and Mary's three-year-old son William was also buried in the Protestant Cemetery. Shelley's heart was finally buried, encased in silver, in 1889, with the son who survived him, Sir Percy Florence Shelley, but his gravestone in the Protestant Cemetery is inscribed: "Cor cordium" ("heart of hearts"), followed by a quotation from Shakespeare's "The Tempest": Protestant Cemetery, Rome The Cimitero Acattolico ("Non-Catholic Cemetery") of Rome, often referred to as the
Prometheus Unbound (Shelley) until his death on 8 July 1822. After his death, Timothy Shelley, his father, 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