1-8
: 1s & 3s petronella turn into centre & set, dance 1/2 reel of 4
9-16
: 3s & 1s petronella turn to own sides **while** 2s petronella turn to
  form lines of 3 across & all set, 2s petronella turn to sides & all
  set on sides.  3 (2) 1
17-24
: 2s dance 1/2 reel of 3 across (2L RSh to 3L at top & 2M RSh to 1M) & 1/2
  LSh reels of 3 on sides. (1) 2 (3)
25-32
: 2s dance 1/2 reel of 3 across (2M RSh to 1M at top & 2L with 3L), 1s
  cast to 2nd place **while** 2s cross up & 1s turn RH.  2 1 3