{{explanation}}
3s & 4s start on opp sides

1-8
: 1s+2s also 3s+4s dance R&L
9-16
: 2s & 3s cast to ends & down/up middle to dance 1/2 RH across & end
  dancing out to sides with other partner to 1 (2) 3 (4) (2s & 4s on opp
  sides)
17-24
: 1s+2s also 3s+4s dance Ladies Chain
25-32
: 1s cross RH & cast to 2nd place **while** 2s cross up to top, 1s cross
  RH & cast to 3rd place **while** 3s step up
33-40
: 1s cross RH, cast to 4th place **while** 4s step up & all turn RH for 4
  bars. 2 3 (4)(1)