Four trios WMW in a square set
Progression. Each turn the M move one place cclw, the W cross to opposite side.
Espagnole: both W lead RHJ to M side, cross and cast back to exchanged places while Men cross to W side, lead RHJ back to M side crossing to exchanged places ; all turn P EH (2,1)
Note: [27-28] was originally 2 PdB in promhold.
Note: Cosh explicitly tells 1c to pass Lsh in [9-24]; however the Rsh pass is quite common, and nicknamed »Mairi's Divorce«.