1-8
: 1s+2s also 3s+4s dance RH across 1/2 way, 1s+4s dance LH across 1/2
  way, 2+4s also 1s+3s dance RH across right round
9-16
: All set & cross RH, 1s+4s dance 1/2 R&L.  2 1 4 3
17-24
: 2s+4s petronella turn into middle **while** 1s & 3s step up, all set,
  all petronella turn & set
25-32
: 1s+3s dance 1/2 reel of 4 in middle into 1/2 reel of 4 across (3s
  with 2s & 1s with 4s) all giving RSh to same sex ending 2 3 4 1
33-40
: All circle 8H round & back