From a two faced line or wave: Ends face down the line as centers Hinge and then Star Thru with the ends. Finishes in a two faced line. (Norm Oliver 1964)
COMMENT: The Star Thru requires centers in many cases to disengage hands after the Hinge in order to do the Star Thru with the same hand. Should have been a Slide Thru (except Slide Thru hadn't been invented at the time).
From lines of four: Centers Trade and Ends Crossfold. Finishes in double pass thru (from lines facing out) or completed double pass thru (from lines facing in) formation. (Robert Holup 1968)
COMMENT: Use "Ends Crossfold, centers Trade."