1-8
: All set, 1s cast **while** 2s dance in & up to face out, 3s dance in &
  down to face out. 2s+1s+3s dance 1/2 reel of 3 on sides
9-16
: 1s petronella turn into lines across (1L between 3s at top & 1M between
  2s) & all set, 1s dance 1/2 Diag R&L (up/down)
17-24
: 1s petronella turn onto sides (1L between 2s on Ladies' side & 1M
  between 3s Men's side) & all set, 1s dance 1/2 Diag R&L (across)
  (2)(1)(3)
25-32
: All set, turn partners RH & chase clockwise 1/2 way. 3 1 2