Several students of folk music have asserted that the song long predates the earliest published versions; according to Leonard Feather in his "Biographical Encyclopedia of Jazz" it was sung at the Siege of Vicksburg (1863) during the American Civil War and Sandburg said it was widespread before 1888, while John Jacob Niles reported that it emerged before 1830. The fact, however, that the familiar version does not appear in print before 1925 is "strange indeed for such an allegedly old and well-known song", according to music historian James J. Fuld, who suggests that it "is not so ancient as some of the folk-song writers would have one believe."