I've been reading older editions of Concordia's yearbook, The Tower, and every one has a bit of info about Marxhausen. I've found some excellent quotes by Marcy and photos of his work I haven't seen anywhere else. Reinhold is pictured on the bottom alongside one of his pieces. The text says that he "enjoys making home-made wine."
The second page shows a few artworks, presumably by both students and professors. They are not labeled, but at least one piece looks like Marxhausen's sound sculptures, the picture right in the middle. A couple others look like they use wood, which may be by Marxy, or by students who learned to use a similar technique.