1-8
: 1s cross down to dance mirror reel of 3s on opp sides. 1s end in 1st
  place opp sides
9-16
: 1s dance down & out through 2nd place (2s dance to top place bars 9-10),
  down behind 3s; dance up & out through 2nd place opp sides & 1s+2s
  turn LH ready for ...
17-24
: 1s+2s dance Ladies' Chain
25-32
: 1s+3s turn RH on sides, 1M casts down to 3rd place as 1L dances down
  centre (3s step up 27-28); 1s cross LH & 2s+3s+1s set