1-8
: 1s+2s also 3s+4s dance 1/2 R&L, all chase clockwise 1/2 way. 3 4 1 2
9-16
: 3s+4s also 1s+2s dance RH across, 4s+1s dance LH across
17-20
: 4M+1M & 4L+1L dance across (Men making an arch), turn corners with free
  hand to face up/down
21-24
: 4s+1s dance down/up (couple dancing up make the arch) & turn corners
25-32
: Repeat bars 17-24 from new positions
33-40
: 4M+1L change places RH & 1M+4L change place RH, 1s & 4s turn RH 1.1/2
  times. 3 1 4 2