{{explanation}}
2 chords, 3s+4s cross to opp. sides on 2nd chord

1-8
: 1s (in prom hold) dance RSh reel of 3 across with 2s as 4s (in prom
  hold) dance RSh reel of 3 across with 3s
9-16
: 1s, followed by 2s, lead down the middle, 2s divide, 1s lead to top
  followed by 2s
17-20
: 1L+3M set & change places RH **while** 1M+3L change places & set  3 2
  (1) (4)
21-24
: All couples set, turn partner 2H, finish nearer hands joined, 3s and 1s
  facing down, 2s and 4s up
25-32
: Mirror Rondel: 3s dance down under arch made by 2s, 4s dance up under
  arch made by 1s to start. End 2 3 (4) (1)