I own the Schott edition of the Jenner trio for Piano, Clarinet and Horn. This edition is edited by Horst Heussner and is copyright B. Schott's Sohne, Mainz, 1990.
Jenner died in 1920: his work is no longer in copyright. That whole 70-years-after-the-death-of-the-composer thing suggests that Schott weren't able to publish until 1990, but how did they get hold of it?
Am I legally allowed to re-typeset this music? The big problem I can see is that there is no way to tell which markings are Heussner and which are original.
I very much doubt I can get hold of an earlier edition: this one was difficult enough to find. If Schott own it they certainly aren't going to let me have a peek. The Preface says that an early copy passed from the ownership of Mandyczewski to the library of the
Gesellschaft der Musikfreude in Wien, but doesn't say where they got their later edition from (presumably Jenner himself sent it to Brietkopf & Hartel at some point, as he'd sent them an earlier version as well).
This is very sad: a lovely piece of music which is difficult to get hold of by traditional means is virtually unheard of (neither my current horn teacher nor my old teacher, Julian Baker, had any idea of the existence of the piece before I told them), the composer certainly doesn't stand to benefit and the work should be out of copyright, but I see no straightforward way to make a public domain edition available. It isn't that I don't think the editor should be paid for editing, or the typesetter for typesetting: doing these things well does take skill. I do wonder, though, how much of the editing was simply a matter of copying down exactly what was in the manuscript to begin with. If Jenner was anything like Brahms (who wrote down every meticulous detail) then there wasn't much to be done there. And while doing a better job myself on the typesetting is a tall order that I won't be able to fill anytime soon, I'd like to be able to have a crack at it, particularly given that there are some badly-crowded passages in the piano part I have.
There are practical considerations, as well. Foolishly I only ordered one copy of the music (at 57.15 EUR each there is good reason), but in the past I've played in chamber groups and had people not return parts to me. That gets expensive, and extremely annoying. At the moment there are two different groups I want to play this with, but me keeping control of all parts between rehearsals is completely unrealistic: they need to take them away and learn them. But I can't photocopy what I've got because it isn't legal to do so, even if there is no profit involved. In theory I should be getting four more people to buy their own copies, but that takes time and is rather silly. And no, it isn't in the Trinity library, or the Alan Cave chamber music collection, or anywhere else in London that I've been able to look.
I sort of hope that when
IMSLP comes back in July I find that the Jenner is already in there. There is nothing by Jenner in
MusOpen, or in the
Werner Icking Music Archive, or in the
Mutopia Project, but they're all smaller than IMSLP was.