{{explanation}}
2 chords - 2nd chord 3s & 4s cross to opposite side

1-8
: 2s+3s Petronella turn into centre & set to partner, 2s+3s 3/4 turn
  partner RH & dance RH across 1/2 way to change places & end with other
  partner in prom hold (2M+3L facing Men's side & 3M+2L facing Ladies'
  side)
9-16
: 1s & 4s Petronella turn into centre & set, 1/2 turn LH to form 1st/3rd
  place of square set, then Adv+Ret

: **while** 2M+3L & 3M+2L promenade clockwise to form 2nd/4th place of
  square set, then Adv+Ret

: ······3L  2M

{{explanation}}
T  1L ······ ······4M  
O  1M ······ ·····4L  
P   ····3M  2L

17-24
: All circle 8H round to left (2 bars) & set; drop hands & continue circle
  (1 bar), pull back LSh & chase back to places in square set. 1M & 4M
  face out
25-28
: 1M+4M followed by partners cast L round adjacent Man and across
  to 3rd/ 2nd place, (2L+3L step or dance to end on 25-26,  2M+3M step
  to end on 27 - 28 (Now in longways set)
29-32
: 3s+4s & 1s+2s dance RH across.  3 4 (1) (2)