Songs of Innocence, copy B, 1789 (Library of Congress) object 16 The Chimney Sweeper Songs of Innocence, copy U, 1789 (The Houghton Library) object 9 The Chimney Sweeper Songs of Innocence and of Experience, copy L, 1795 (Yale Center for British Art): electronic edition object 7 The Chimney Sweeper Songs of Innocence and of Experience, copy Y, 1825 (Metropolitan Museum of Art) object 12 The Chimney Sweeper Songs of Innocence and of Experience, copy Z, 1826 (Library of Congress) Object 12 The Chimney Sweeper Songs of Innocence and of Experience, copy AA, 1826 (The Fitzwilliam Museum) object 12 The Chimney Sweeper Songs of Innocence and of Experience, copy B, 1789, 1794 (British Museum) object 45 The Chimney Sweeper Songs of Innocence and of Experience, copy A, 1795 (British Museum) object 36 The Chimney Sweeper Songs of Innocence and of Experience, copy L, 1795 (Yale Center for British Art) object 41 The Chimney Sweeper Songs of Innocence and of Experience, copy N, 1795 (Henry E. Huntington Library and Art Gallery) object 5 The Chimney Sweeper Songs of Innocence and of Experience, copy W, 1825 (King's College, Cambridge, UK) object 37 The Chimney Sweeper Songs of Innocence and of Experience, copy Y, 1825 (Metropolitan Museum of Art) object 47 The Chimney Sweeper Songs of Innocence and of Experience, copy Z, 1826 (Library of Congress) object 37 The Chimney Sweeper Songs of Innocence and of Experience, copy AA, 1826 (The Fitzwilliam Museum) object 37 The Chimney Sweeper