1-8
: 1s & 4s petronella turn into centre (2s+3s step slightly up/down to form
  2 diamond shapes) & all set, all Petronella turn & set again
9-16
: 1s & 4s cross RH, cast to meet other prtnr on sides & turn 2H, 1s+4s
  dance LH across as 2s & 3s set, turn 2H, dance out to 1st/4th pl & set
17-24
: 1s & 4s dance Figs of 8 round end couples
25-32
: 1s set advg & turn 2H, dance down middle for 3 bars followed by 4s+3s
  (who dance up through 2nd pl into middle) & cast to sides. 2 3 4 1