From facing pairs (any arrangement of sexes): A four hand movement (sometimes called Full Square Thru or Square Thru Four). Starting with a right and alternating hands, pull by and quarter in. Give a left pull by and quarter in, give a right pull by and quarter in, then give a left, pull by and DON'T TURN. The general rule on square thru is keep turning in after each pull by until the last one and then don't turn.
Bill Hansen 1957
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.