1-8
: 1s+2s also 3s+4s set, Petronella-in-tandem to right, set &
  Petronella-in-tandem to opposite sides
9-16
: 2s+1s also 4s+3s set, 1/2 turn partners 2H & open out to dance 4H round
  to left.  2 1 4 3
17-24
: 2s+1s also 4s+3s dance RH across 1/2 way, 2s & 3s complete RH across
  back to place **while** 1M followed by partner dances down to 3rd
  place & crosses to own side as 4L followed by ptnr dances up to 2nd
  place & crosses to own side, 2s+4s also 1s+3s dance LH across.
   2 4 1 3
25-32
: 4s & 3s lead up LH 1place, cross & cast to 2nd/4th place, lead up RH,
  cross & cast 1 place