I'm posting here a part of Keith Jarrett's Paris Concert, one of his totally improvised piano solo concerts. As I said yesterday, his stance about improvisation seemed to me very similar to that of Olson, I mean, fidelitiy to the work for the sake of the work (poetry or music): image leads to a further image almost like a causal necessity, and, for Jarrett, music blossom for itself so he just need to follow the path the music itself dictates. Again, necessity, continuous and anonymity of the author. All this idea as oposed to that of the totally preconceived en closed work of art. Hope this could be useful (and correct) Garrett.