1-8
: 1s & 3s petronella turn into middle, 1/2 turn partner RH into prom hold
  & promenade clockwise 1/4 way round to end behind 2s (a line of 6
  across)
9-16
: 1s+2L also 3s+2M dance 2 reels of 3 (1M & 3L pass partners RSh to start)
17-24
: 1s & 3s in prom hold promenade clockwise 1/4 way (to top & bottom facing
  up/down - 3s & 1s on opp sides) & all circle 6H 1/2 way to left.
   1(2)3
25-32
: 1s+2s dance 1/2 R&L, 1s cross RH & cast to 3rd place