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

1-8
: 1s & 4s cross RH down/up & cast to partners place, 2s & 3s dance up/down
  & cast back to place
9-16
: 1s & 4s dance Figs of 8 (on own sides) round 2s/3s
17-24
: 1s+2s also 3s+4s dance RH across, 2s+3s dance LH across
25-32
: 1s & 4s set, cross RH, 1s+4s chase anticlockwise to end in 3rd/2nd
  places (2s & 3s step down/up)  2 4(1)(3)