Note: [3-4] is NOT in DTr position.
On 2nd chord 3c+4c change sides to 1,2,3x,4x. Centro-symmetrical dance.
Unofficial: On 2nd turn, 4c has an easier start if 1c+3c+4c dance a 3c Poussette
3C Chain Progression was earlier known as Chaperoned Chain Progression
after 2nd turn new 3c step up on [1-2]
In 17-32, the corners traditionally set one bar to the person you just passed, then one bar to the next person to pass. In a variant for [19-24] 1c turns BH in PdB.
Note: Cosh explicitly tells 1c to pass Lsh in [9-24]; however the Rsh pass is quite common, and nicknamed »Mairi's Divorce«.