{{explanation}}
2 chords  -  2nd chord 4s cross to opposite sides

1-8
: 2s turn RH 1.1/2 times to face 1st corners, 2s dance 1/2 diagonal reel
  of 4 with 1st corners & pass RSh to face 2nd corners
9-16
: 2s dance 1/2 reel of 4 with 2nd corners & turn RH to 2nd place opposite
  sides. (3)2(1)(4)
17-24
: 2s+1s dance 1/2 R&L. 3s+1s also 2s+4s dance 1/2 R&L (giving RH on sides
  to start) (1)3 4(2)
25-32
: 1s+4s (1st & 3rd places) dance Ladies' Chain (up/down)
33-40
: 1s+3s set & dance 3/4 double Fig of 8 (3s cross up & 1s cast) **while**
  4s+2s dance full double Fig of 8 (2s cross up & 4s cast) 3 1 4(2)