1-8
: 1s & 3s petronella turn into middle & set, 1s+3s dance 1/2 RSh reel of 4
  up/down middle
9-16
: 1s & 3s change places with partners RH, 3M+1L change places LH &
  1L+3M+2s dance LH across **while** 1M+3L chase clockwise 1/2 way
17-24
: 1s & 3s petronella turn to own sides & set, 1s cast 1 place & turn LH
  into…
25-32
: 1s dance reels of 3 across (1L with 2s & 1M with 3s) ending in 2nd
  places (NB 2nd time - 1s dance between 3s to 4th pl)