I read an article on the uses of horn in a home town newspaper in PA, so I don't have the information in front of me. However, a search may yield results.
I think it needs to be steamed to be made pliable.
4,279 posted on 09/18/2005 6:32:28 AM PDT by NicknamedBob
(I am impervious to insult, being extraordinarily dense, rather like Superman.)