John from Hull,Nerdlike to the last, I followed your link, but it led only indirectly to a page for ragtime.org which didn't seem germaine.
You've whetted my curiousity, any chance of a relink, because "docherty guitars" and "docherty luthier" searches gave no results on Google and AltaVista?
Contributed to BBC4's feedback, though.
Alan