On 2nd chord 3c+4c change sides to 1,2,3x,4x. Centro-symmetrical dance.
3c+4c cross on 2nd chord(1,2,3x,4x). This dance has top/bottom symmetry
Square set plus 5M / 5W in middle face P with backs to 4c / 2c
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«.