From facing couples or double pass thru formation: Right hand or lead dancers pull by with a right then pull by left hands with the next. Immediately after the left hand pull by, lead dancers loop back to the left then pass left shoulders with the trailing dancer coming out of the center and follow the other trailing dancer to finish in single file facing out.
Don Anderson 1958
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.