1-8
: 1L+2M cross RH & cast RSh round partner; cross LH & cast LSh back to
  original places
9-16
: 1M+2L cross LH & cast LSh round partner; cross RH & cast RSh back to
  original places
17-24
: 1s+2s set & Petronella in tandem; facing up/down all set & change places
  RH with partner
25-32
: 1s+2s set & Petronella in tandem; all turn partner 2H.  2 1