{{explanation}}
2 chords: 2nd chord 3s & 4s cross to opp sides

1-8
: 1s+2s also 3s+4s Set & Rotate anticlockwise (set, cast Left 1 place
  anticlockwise, change places LH with partner & dance one place round)
9-16
: 2s+1s also 4s+3s dance LH across; 1s+4s dance RH across, 1M+4L on Men's
  side & 1L+4M on Ladies' side take prom hold
17-20
: 1M+4L+2s also 1L+4M+3s dance 1/2 RSh reels of 3 across. End 1M+4L in 2nd
  place Ladies' side facing down, 1L+4M in 2nd place Men's side facing
  up
21-24
: 1/2 LSh reels of 3 on sides (2s & 3s dance loop into place at end to
  face clockwise).  3 4 (1) (2)
25-28
: 2s+3s chase clockwise 1/2 round **while** 4s+1s circle 4H round to
  Right.  2 4 (1) (3)
29-32
: All set, all cross RH. (2) (4) 1 3

{{explanation}}
Repeat from new places (top couples on opp sides) Promenade is with Lady on Man's Left