1-4
: 1s+3s set & 3/4 turn RH to form line up/down centre
5-8
: 1s+3s dance 1/2 reel of 4, 1M+3L turn 1/4 LH to end between 2s across
  the set
9-12
: 2L+1M+3L+2M dance 1/2 reel of 4
13-16
: 2L+1M also 3L+2M set, change places LH, 2s pass LSh
17-20
: 2M dances RH across with 1s as 2L dances RH across with 3s ("2nd corner
  positions")
21-24
: 1s turn 2H ending in 3rd place as 3s turn 2H in 1st place **while** 2s
  pass LSh & dance out opposite sides, 2s dance clockwise 1/2 way round
  to 2nd place own side. All take promenade hold & face up.
25-32
: 3s+2s+1s Promenade ending with 3s casting off to 2nd place as 2s dance
  up to 1st place.  2 3 1