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

1-8
: All set, 1s & 4s cross RH **while** 2s+3s dance RH across 1/2 way, all
  set & cross RH
9-16
: All circle left for 2 bars, Men turn Lady behind 2H once round & all
  circle left for 4 bars. 1 (3) 2 (4)
17-24
: 1s & 3s turn 2H 1/2 way to face up, 1s cast 1 place on opposite
  sides **while** 3s dance up to top, 1s+2s dance RH across 1/2 way & 1s
  cross down to bottom **while** 2s cross up to top. 2 3(4)(1)
25-32
: 1s & 2s cast into centre, dance RH across 1/2 way, 1M+2L lead out Men's
  side cross & cast to ends & cross over RH **while** 1L+2M dance
  similarly on Ladies side **while** 3s+4s dance towards each other &
  turn 2H on sides. 2 3 (4)(1)