1-8
: 1s turn RH, cast (2s step up) then 1L+2s & 1M+3s dance RH across.  1s
  end facing 1st corners
9-16
: 1s dance Corner Pass+Turn with 1st corners, pass RSh & repeat with 2nd
  corners. 1s pull back RSh to end BtoB in centre facing opp sides
17-24
: 2s+1s+3s dance Double Triangles. Bars 23-24 1s petronella turn to 2nd
  place own sides
25-32
: 2s+1s+3s circle 6H round and back