Border ballad
The Anglo-Scottish border has a long tradition of balladry, such that a whole group of songs exists that are often called "border ballads", because they were collected in that region.
Border ballads, like all traditional ballads, were traditionally sung unaccompanied. There may be a repeating motif, but there is no "chorus" as in most popular songs. The supernatural is a common theme in Border ballads, as are recountings of raids and battles.