1-4
: 1s set, 1M pulling back LSh to face out, 1s dance down to 2nd place (1M
  behind 2M, 1L in front of 2L, 2s step up). 1L faces out
5-8
: 1L followed by 1M dances down behind 3L, across set, & up round 3M
  to 2M's place **while** 1M dances up middle to 2L's place & faces out.
   2 (1) 3
9-16
: 2s+1s+3s dance LSh reels of 3 on sides (2s+1s pass LSh)
17-24
: 2s+1s+3s Set+Link for 3 couples; all chase clockwise 1/2 round into
  lines of 3 across (1M between 2s at top, 1L between 3s)
25-32
: 2s+1M also 3s+1L repeat 17-24 to end (3) 1 (2)
33-40
: 3s+1s+2s dance diagonal R&L (1M down, 1L up).  2 1 3