The banker and political writer Horace Smith spent the Christmas season of 1817–1818 with Percy Bysshe Shelley and Mary Shelley. At this time, members of the Shelleys' literary circle would sometimes challenge each other to write competing sonnets on a common subject: Shelley, John Keats and Leigh Hunt wrote competing sonnets about the Nile around the same time. Shelley and Smith both chose a passage from the writings of the Greek historian Diodorus Siculus, which described a massive Egyptian statue and quoted its inscription: "King of Kings Ozymandias am I. If any want to know how great I am and where I lie, let him outdo me in my work." In Shelley's poem, Diodorus becomes "a traveller from an antique land."