{{explanation}}
Each couple dance 64 bars. A New Couple starts after 32 bars (ie on bars 1, 33, 65 & 97)

1-8
: 1s set, lead into the centre, passing Lady in front dance out sides (L
  between 2s & M between 4s) back to places & 1/2 turn LH
9-16
: 1s+3s in prom hold Adv+Ret 2 steps & dance to right behind side couples
  to opposite places
17-24
: 1s+3s dance Men's Chain
25-32
: All circle 8H round & back
33-40
: (New Couple starts as at bar 1) as original 1s+3s dance R&L (RH to opp
  partner to start)
41-48
: 1s+3s in prom hold advance, 1/2 turn partner RH, dance 1/2 Diamond
  Poussette (to change places) & 1/2 turn RH back to original places
49-56
: 1s+3s dance interlocking Men's Chain (all Men giving LH across in
  centre)
57-64
: All circle 8H round & back