From two single file pairs facing (or each side of a double pass thru formation): Leads pull by with a right, do a Left Turn Thru with the one you meet then pull by with a right in the center to stand behind the ones facing out. Finishes in two single file pairs back to back.
Bill Shymkus 1958
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.