{{explanation}}
1s+2s also 3s+4s start

1-8
: 1s/3s dance Fig 8 down round 2s/4s
9-16
: All couples dance DoSiDo (pass RSh to start); All couples turn partner
  RH
17-24
: 2s/4s dance Fig 8 up round 1s/3s
25-32
: All couples dance DoSiDo (pass LSh to start); All couples turn partner
  LH
33-40
: 1s+2s also 3s+4s dance RH across & LH across back to place
41-48
: 1s/3s cast 1 place (2s/4s step up); All couples turn RH or swing

{{explanation}}
Repeat with just middles couples dancing, repeat again with top 2 couples & bottom 2 couples dancing and so on  
Deviser variation: (Reel 4x48) 1s+2s dance bars 1-40 as above. Bars 41-48: 1s cross RH, cast to 4th place (2s+3s+4s step up; All couples swing.