"Old Bangum" is also known as "Sir Lionel", "Bold Sir Rylas", "Rackabello", "Wild Hog in the Woods" and "Bangum and the Boar". A. L. Lloyd comments that the original ballad of "Sir Lionel" was probably based on the courtly romance of "Sir Eglamour of Artois". The American forms with the nonsense syllable burdens are always criticized in academic discussions. "Gone are the lady in distress and the cruel giant; all that remains of this tale of medieval pageantry is a fight between a knight and a boar and an involvement with a wild woman." The story probably derives from the motif of a shape-shifting villain who imprisons a woman and prevents her rescue by changing into the wild boar shape. Besides Sir Eglamour, the story may be related to the Welsh tale of King Arthur hunting a wild boar. There is also the similarity of Old Bangum riding out with "sword and pistol by his side" with "Frog Went a-Courting".
It was printed in F.J. Child's The English and Scottish Popular Ballads (#18) under the title "Sir Lionel", Alfred Williams' Folk-Songs of the Upper Thames (1923) as "Bold Sir Rylas", Folk Songs of Peggy Seeger and it appears in the Roud Index of Folk Songs (#29).
It was recorded by A.L. Lloyd and Ewan MacColl, John Roberts and Tony Barrand, Peggy Seeger, Martin Carthy, the Watersons and others.
I think I learned it from Roberts and Barrand.