From couples back to back: Do a Vertical Half Tag then turn individually a quarter more in the same direction turned to do the Partner Wheel and Deal. Finishes in a left facing box.
From box formation: Leads fold behind adjacent trailer then all move up to box formation again and the folders turn another quarter in the same direction as the fold. Finishes in one of the varieties of T-Bone formation.
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.
