Percy Bysshe Shelley ( 4 August 1792 â `` 8 July 1822 ) was an English poet of the early nineteenth century . He is widely thought of as one of most important poets of the Romantic movement in English literature . Percy Bysshe Shelley ( 4 August 1792 â `` 8 July 1822 ; was one of the major English Romantic poets and is critically regarded among the finest lyric poets in the English language .