1-4
: 1M followed by 1L casts below 2M & crosses to 2L's place (2s step up
  3-4). 1M faces out
5-12
: 2s+1s dance Ladies' Chain. 1M faces out
13-16
: 1M followed by 1L casts below 3L & crosses to 3M's place (3s step up
  15-16)
17-24
: 3s+1s dance RH across & LH across back to place
25-32
: All Adv+Ret; all turn partner 2H. End 2 3 1