Note that both times the couple moving UP makes the arch.
note: 3c does not move on bars 1-8.
Note: Cosh explicitly tells 1c to pass Lsh in [9-24]; however the Rsh pass is quite common, and nicknamed »Mairi's Divorce«.
3c+4c cross on 2nd chord(1,2,3x,4x). This dance has top/bottom symmetry
[25-32] represent tacking the ship, therefore no polite turns