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

1-4
: All set, 1s & 4s cross down/up **while** 2s & 3s cast to ends
5-6
: 2L+1M & 4M+3L change places LH **while** 2M+1L & 4L+3M change places RH
  on sides. (1)2 3(4)
7-8
: 1s & 4s cross down/up to position between 2nd & 3rd places - Men BtoB
  facing other Lady (4L on Mens side) **while** 2s & 3s dance up/down to
  ends
9-12
: 1M & 4M dance out passing Ladies RSh, face in & set **while** Ladies
  dance in & passing each other LSh petronella turn to face each other
  (1L facing up & 4L facing down) & set moving to right to face own
  partner
13-16
: Repeat bars 9-12 with Men setting in centre & end facing other partner
17-24
: Men turn other partner 2H 1.3/4 times onto sides (4s in 2nd pl & 1s in
  3rd place), 4s+1s dance 4H round to left
25-28
: All set, turn partners 2H to end in centre (top 2 couples face down &
  bottom 2 couples face up)
29-32
: 4M+1L also 4L+1M dance out sides, cast to ends, 4M+2M also 3M+1M change
  places RH on sides **while** partners change places LH. 2 4(1)(3)