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

1-8
: 2L+3L passing LSh dance a diagonal reel of 4 with 1L+4L
9-16
: 2M+3M passing LSh dance diagonal reel of 4 with 1M+4M
17-24
: 2s+1s also 4s+3s dance RH across, 1s+4s dance LH across 1/2 way then
  2s+4s also 1s+3s dance 1/2 RH across to end (2)(4)1 3
25-32
: All dance clockwise 1/2 way &set to end (3)(1)4 2
33-40
: 3s+1s also 4s+2s dance 1/2 double Figs of 8. all turn 2H. 3 1(4)(2)