well i think it has origins within the English folk mowement.

I can see a relationship between Isaac Guillory, Eric Roche - and all that stuff kicks off with Davy Graham and Bert Jansch.

The instrument itself was - that twin neck thing was kicked off in Englannd with Rob Armstrong making a thing like that for Eddie Furey in the 1970s. This is the folk music scene I've experienced. If you had your head buried in the Penguin Book of English Folksongs and missed all that. You can't complain if you've only got a penguin's eye view of the subject.