Amongst the most widely-disseminated and influential piano music of the early 19th century, the sixteen Nocturnes of John Field are here published together for the first time, in an edition that through careful consideration of publishers' plate numbers, Russian first editions and the composer's habits of revision reveals the number and chronology of the little-known Nocturne No. 10, and its relation to the unnumbered 'Troubadour' Nocturne.