Thanks 40Hz - yes I have tried both of those. I am exchanging emails with someone from the Byron Society which may lead to some useful info (not yet though). One of the people is a US University Professor who pointed me at some helpful essays. Unfortunately the Byron Society are probably more interested in Byron's original version than a German translation or an adapated version in German. The Schumann House were helpful but couldn't supply copies.
I have bought a number of CDs in the hope that I could find one with the text but they are all in German without even the German text (let alone an English translation). I even had a German specialist music shop looking for a suitable CD and they failed.
The original pblisher was Breitkopf & Härtel in Weisbaden. I have written to them to see if they can find it in their archives (awaiting a reply).
Darwin ... I have problems with libraries because I live in a remote area of the UK. The nearest academic library is about 40 miles away and they won't let me borrow books. With the current fuel prices it would cost a lot to drive there repeatedly - and I can't realistically photocopy dozens of pages (even if they would let me). Inter-library loan is not much use - last time I tried it it took them 6 months to get me the wrong book! I tried the British Museum but they wanted £24 per page to make a copy - it would be cheaper to pay for cloning technology to resurrect Byron!!!!
Actually days of 'googling' has been quite productive as I have found loads of journal articles that are relevant research for what I want to write. I can get copies through the Open University library online journal access - but unfortunately their search engine is nowhere near as good as google. You are supposed to be able to do full text searches of all journal articles but it is very hit and miss what it actually finds. Generally I can get the articles I find on google by looking for the relevant journal issue, but library searching of the same journals generally finds a fraction of the hits for the same words and phrases.
Thanks for trying guys - no winner yet though