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

1-8
: 1s & 4s cross RH & cast in 1 place, 1s+4s dance RH across & end facing
  corners
9-16
: 1s & 4s 1/2 turn corners RH, 2s+3s dance RH across **while** 1s & 4s
  chase 1 place anticlockwise & set, 2s & 3s 1/2 turn new corners LH
17-24
: 1s & 4s 1/2 turn partners RH into Prom hold to dance out (4s out Ladies
  side, 1s out Mens side) casting to right & into centre then 1s & 4s
  change places RH with opposite dancer
25-32
: 4s+1s dance RH across ending on sides, 4s & 1s turn partners RH.
   2 4(1)(3)