Um. That bit of rockart on the German 'poetry' page. Are you sure? To me the carving's on the top edge of the 'German' stone & the bottom edge (well, not the top edge anyway) of the Irish one.

German - http://www.verlag-am-eschbach.de/images/big/419.jpg

Irish - http://www.themodernantiquarian.com/post/22885

love

Moth