From column formation or three and one column formation (i.e., three face one direction and one faces the other): Ends of each column single hinge with adjacent dancer (or partner) as the center four stand pat to finish between the hinging dancers. Finishes in various unusual formations depending upon starting facings in the columns.
Bill Davis 1974
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.