For this 1979 Terraplane Chorography I, leif BRUSH Retrospective, composer Tom Wegren (http://www.d.umn.edu/~lbrush/TomWegren.jpg) and sound artist leif BRUSH (http://www.d.umn.edu/~lbrush//LB_majorBirchtreeanchor83.jpg) collaborated in a public Tweed Museum Duluth Minnesota performance. Together with Tom's original composition Leif was able- for the first time- to hear the joining of all his Terrain Instruments up to this presentation. He considered these analog reel-to-reel recordings 'playings: intercepted compositions which include occasional personal intercession'.