1-8
: 1s set & Petronella turn (2s step up 3-4); 1s set & turn 3/4 RH to
  end 1L facing 2M, 1M facing 2L
9-12
: 1s+2s change places LH, 1s dance anticlockwise round to face 2s
  again **while** 2s turn 3/4 RH
13-16
: 1s+2s change places LH, 2s dance anticlockwise round to face 1s
  again **while** 1s turn 3/4 RH into line of 4 across
17-24
: 1s+2s dance LSh reel of 4 across. Bars 23-24: 1s turn LH
25-32
: 1s cross up LH between 2s & cast to 2nd place opp side; 2s+1s set &
  cross RH.  2 1