A.G.Maisey, thanks for the info. I am stuck to using the web and even worse translated versions.
My interest was inspired by recalling what a guru told me, he said his teacher the sat guru believed the first keris was made by empu ramayadi under instruction of a saint who taught him the use of the 16 metals.
Well it stuck in my head for years and then recently I discovered there is text called: Caritaning Wesi saking panembahan karang (Treatise on the qualities, physical and spiritual, of diffrent irons used in forging of keris. The teachings of panembahan karang (Bathara Mudhik) to Empu Ramayadi)
https://books.google.co.uk/books?id=...page&q&f=false
So it would appear the story I was told is at least legitimate "mythology"