Tune: Butterfly Hornpipe? The Butterfly is a Country Dance which people were dancing in England in ~1909.
Cecil Sharp recorded it and published it in “The Country Dance Book” (Part 1) published in 1909.
It is a proper duple minor longways dance.

A1	1-4	Right hands across...
        5-8	  ... and left hands back
B	1-4	1s make an arch, 2s duck under, then 2s make an arch and 1s duck under
        5-8	That again
A2	1-8	Partner swing, half-way around the minor set, counter-clockwise to progress

Video: https://www.youtube.com/watch?v=VpmJk2FjdIo