1-8
: 1s & 3s petronella to opposite sides **while** 2s & 4s step up, set,
  petronella turn into centre & set
9-16
: 2s also 4s in prom hold dance reels of 3 across (RSh to 1L/3L) ending as
  bar 8
17-24
: All set to partners, 1s+2s also 3s+4s circle 4H round to Left to end on
  own sides, 1L+2L also 3L+4L change places RH & 1L+4L turn LH.  2 1 4 3
25-32
: 1s+3s+4s (bottom 3 cpls) dance the Knot.  2 3 4 1