{{explanation}}
2 chords - 2nd chord 3s & 4s cross to opposite side

1-8
: 1s+2s also 3s+4s dance mirror Set & Link (1s cast, 2s dance up), end
  couples cast in as middle couples dance to ends. Repeat to original
  place
9-14
: 2M and 3M dance 1/2 Fig 8 out nearest end & cross to original
  place **while** 3L and 2L cast to furthest end and follow 2M/3M by
  crossing over and casting round 1L/4L to exchanged places
15-16
: 2s+3s dance 1/2 LH across
17-22
: 2s and 3s repeat bars 9-14 now with 2L and 3L dancing 1/2 Fig 8 and
  crossing **while** 2M and 3M cast to furthest end, cross over and cast
23-24
: 2s+3s 1/2 RH across
25-32
: 1s reel with 2M on Men's side **while** 4s reel with 3M on Ladies' side
  (Men pass LSh as 1L & 4L cross to pass ptnr RSh. 1L & 4L end in own
  place & Men have exchanged places)
33-40
: 1s reel with 2L on Ladies' side **while** 4s reel with 3W on Men's side
  (Ladies pass RSh as 1M & 4M cross to pass partner LSh). End 3 1 (4)
  (2)