1-8
: 1s & 3s dance similar loops:

: 1L & 3L followed by partner dance anticlockwise loops round 2s/4s (1s
  round 4s, 3s round 2s) with Men dancing in between the standing
  couples to take lead, continue dancing anticlockwise round standing
  couples with Ladies dancing between the standing couples & dancing
  couples face in
9-12
: 1L+4L & 3L+2L 1/2 turn & twirl out to change places **while** partners
  change places by chasing clockwise 1/2 way (in 4s)
13-16
: 1M+4M & 3M+2M 1/2 turn & twirl out to change places **while** prtnrs
  change places by chasing cl'wise 1/2 way (1s & 3s now back in the
  middle)
17-24
: 1s+3s dance LH across 1/2 way, 3M & 1M followed by partners dance out to
  partners original place
25-48
: 2s & 4s repeat bars 1-24
49-52
: 1M+3M dance into middle (pass LSh) & turn right to face 4s/2s
53-56
: 1M & 3M 1/2 sets to Men then Ladies as 4s/2s set, 1M & 3M dance out
  between 4s/2s & chase back to original places
57-64
: 2M+4M repeat bars 49-56
65-72
: Ladies dance a double Ladies' Chain
73-80
: All Promenade anticlockwise round the set