Percy Florence Shelley Bysshe Shelley, his namesake, and his wife author Mary Shelley. His elder siblings, consisting of a premature girl who died at few weeks old and a brother and a sister who died in childhood left him as the only surviving child as his mother suffered a miscarriage in 1822. His parents lived in Italy for several years, until his father drowned off Livorno, whereupon his mother moved back to England with him. Mary Shelley never remarried; Percy Florence had no further siblings. He joined Harrow School in 1832, and went up to Trinity College, Cambridge in October 1837. Shelley inherited
Percy Bysshe Shelley Frankenstein", in which he argued that Percy Bysshe Shelley's contributions to the novel were much more extensive than had previously been assumed. It has been known and not disputed that Shelley wrote the Preface – although uncredited – and that he contributed at least 4,000–5,000 words to the novel. Lauritsen sought to show that Shelley was the primary author of the novel. In 2008 Percy Bysshe Shelley was credited as the co-author of "Frankenstein" by Charles E. Robinson in a new edition of the novel entitled "The Original Frankenstein" published by the Bodleian Library in Oxford and by Random House