Note: Cosh explicitly tells 1c to pass Lsh in [9-24]; however the Rsh pass is quite common, and nicknamed »Mairi's Divorce«.
Trio face trio RR.
Many variations in handing, polite turns and shoulder exist
after 2nd turn new 3c step up on [1-2]
3c+4c cross on 2nd chord(1,2,3x,4x). This dance has top/bottom symmetry