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
The Life of Percy Bysshe Shelley of Shelley's life that Hogg had only learned about secondhand. The Shelley family helped him by providing Percy Shelley's papers to him for use in his research. Percy Shelley's sisters Helen and Margaret also contributed accounts of childhood memories involving their brother. Hogg was known for the strength and clarity of his memory, and was able to recall minor details from the time that he spent with Percy Shelley. The initial plan was to release a four-volume work and the first two volumes of the book were published in 1858 by Edward Moxon. The text of "Shelley at Oxford" was