The poems which follow appeared, with a few exceptions, either in the volumes published from time to time by Shelley himself, or in the Posthumous Poems" of 1824, or in the "Poetical Works" of 1839, of which a second and enlarged edition was published by Mrs. Shelley int he same year. A few made their first appearance in some fugitive publication - such as Leigh Hunt's "Literary Pocket-Book"- and were subsequently incorporated in the collective editions. in every case the editio princeps and (where this is possible) the exact date of composition are indicated below the title.