{{explanation}}
3s & 4s start on opp sides

1-8
: Top 3 cpls set, top 3 dancers on Ladies' side (1L+2L+3M) cross passing
  prtnrs RSh & chase clockwise back to the Ladies' side
9-16
: Bottom 3 cpls set, bottom 3 dancers on Men's side (2M+3L+4L) cross
  passing prtnrs RSh and chase clockwise back to the Men's side.
17-24
: The 4 Ladies (now in the middle positions) dance 1/2 RH across, take
  prom hold with prtnrs and dance clockwise 3 places round the set,
  ending in the sidelines facing in, Men with partner on right
25-32
: All 4 cpls set, petronella-in-tandem to the right, set and change places
  RH with person facing, ending 3 (4) 1 (2)
33-40
: All dance LSh reels of 4 on side (3s and 2s begin by pulling back RSh).
41-42
: Middle dancers (4s+1s) turn RH on sides to end BtoB, **while** 3s & 2s
  cross RH
43-48
: All dance a Grand Chain for 3 places (LH, RH, LH) to end 2 4 (1) (3)