Hans Werner Henze Manuscript found!
He just followed the hint that the “Three Tentos” of “Kammermusik 1958” contained material of the radio play “Der sechste Gesang” (The sixth chant, Text by Ernst Schnabel). Finally he came across the original manuscript “musiche per chitarra – accompagnando il SESTO CANTO di Ernesto Schnabel”, consisting of 46 numbers. Grün has published an essay in 2013/2014 well worth reading about the discovery, the connection to the “Three Tentos” as well as to “Maratona di Danza” in a German and an Italian guitar magazine (see category “Publications”):
