All arm turn partner by the left. Head ladies "chain" left, head men "chain" right (side men must "chain" left and side ladies must "chain" right). All arm turn the one they meet halfway by the left and all "chain" back home again to arm turn partners by the left. This time the head men chain left and the head girls chain right to arm turn the one they meet with a half left turn and all chain home again once more to arm turn partner by the left to take the next call. The chain is "illegitimate" because there is no courtesy turn after the right hand pull by--only a left arm turn halfway.
Jerry Helt and Madeleine Allen 1950's
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.