A longshot idea, did you try contacting the church you sang at? Some of the churches I have worked with or for have had excellent music libraries that had holdings going back 70 years or more. Then again a many of them have had some "helpful" person tidy things up and disposed of vast amounts of "useless" stuff. Resulting in a trendy 10 year old collection of not terribly interesting.
-------- Original message --------
From: Bernhard Kleine <address@hidden>
Date: 6/9/18 3:12 PM (GMT-05:00)
To: lilypond-user <address@hidden>
Subject: [OT] Search for Morgensterns Galgenlieder for choir
When I was young we sung a piece of Christian Morgensterns Galgenlieder