1-8
: 1s+3s Petronella in tandem to face each other in the centre, 1s+3s
  set, 1s+3s dance LH across to finish 1s/3s facing 4s/2s
9-12
: All dance 1/2 reels of 4 across
13-16
: 1s+4s also 3s+2s dance 1/2 R&L (on bars 15-16 4s turn 3/4 LH so that 4M
  faces 1s on the side & 4L faces 2s in middle)
17-20
: 3s set twice **while** 4L+2s & 4M+1s circle 3H to the left. On bar 20 4M
  pulls RSh back to finish on 4L's left facing 2s
21-24
: 2s+4s dance Petronella in tandem to finish 4s at top & 2s at
  bottom, 2s+4s set 4 1 2 3
25-32
: All dance 8H round & back