Thank you very much for that comment, Umi – I’ve been reading some interesting things about pre-literate cultures,and your references fit in well with that. I’m not sure if it will fit in with the PhD (or how – yet!) but there are some fascinating effects of writing.
I have also been wondering how important memory techniques were to certain types of poetry. Knowing that poems could be written down must have changed the way people thought of the art form.