From column formation: All circulate once and a half plus the center six Trade; then six (single file) Circulate once and a half plus center four Trade; then four Circulate once and a half plus last two Hinge. Finishes in a two faced line of eight (lines of four end to end and facing opposite).
Ron Schneider 1976
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.