Answering a question about alternate tuning today got me thinking about Nashville Tuning and that this is basically the exact same concept used by Stanley Clarke (and apparently Ron Carter) to "invent" the Piccolo Bass.
This article attributes the invention to Ray Edenton; its reference to this article seems to imply the same... The wiki for Nashville Tuning and Ray Edenton do not reference this at all (I realize that Wikipedia does not always contain the most accurate or complete information) and the web doesn't turn up a lot of results otherwise.
Did he "invent" this method of adding thinner strings to an instrument in order to allow tuning to higher pitches? Does this method have roots even further back in time and potentially on other instruments?