DOWNLOAD: John Field - Nocturne No. 5 in B-flat Major ( from 18 Nocturnes by Field). Piano sheet music to print immediately or to view in mobile devices. John Field, who was one of the prominent composers active in the Early Romantic era, wrote this piece titled "Nocturne" No. 5 in B-flat Major from 18 Nocturnes. The composition is categorized as "Piece" in the sheet music library and the level of difficulty in the piano music database is 7.