1-8
: 1L followed by 1M casts 2 places & crosses to 3M's place (2s+3s step
  up 3-4); 3s+1s dance RH across. 1L faces out
9-16
: 1L followed by 1M casts up 1 place & crosses to 2L's place (3s step
  down 11-12); 2s+1s dance LH across.  2 1 3
17-24
: 1L sets to 2L & turns RH on sides **while** 1M sets to 3M & turns RH; 1s
  turn 1.1/4 LH to face 1st corners
25-32
: 1s+1st corners dance Corner Chain, 1s face 2nd corners
33-40
: 1s+2nd corners dance Corner Chain, 1L ends facing out.  2 1 3