1-4
: 1s+3s advance into middle & 1M+3L crossing LH dance out between 2s
  as 1L+3M crossing LH b'tw'n 4s to end on side lines either side
  of 2s/4s
5-8
: All Adv+Ret
9-16
: All dance RSh reels of 4 up/down but on bar 14 1s+3s give LH in passing
  & turn into prom hold facing centre & pass LSh to face other
  couple **while** 2s/4s continue their reels but on bar 16 give turn LH
  into prom hold facing in. (All Ladies on Man's Right)
17-24
: All in prom hold dance reel of 4 across but on bar 24 1s+3s do not pass
  LSh but curve round to finish 1L+3M facing 4s & 1M+3L facing 2s
25-28
: 1s+3s dance RH across with 2s/4s
29-32
: 1s+3s dance LH across in centre & Men follow their partners to original
  places
33-40
: All set to partners & turn 2H once round into 8H round to left 1/2 way
  to end opposite original positions

{{explanation}}
Repeat with 2s & 4s as dancing couples