[r-t] Doubles 240s

[Philip Earis]

Don:
> Ooh, you've got my attention: how do you ring a 720 of Bob Minor 
> without singles, please? Variable hunt or something?

It was first described in Clavis Campanalogia (1788), I think, with a 720 by John Holt with three extra bobs affecting the treble. Does someone have the composition to hand?

Ander also has some examples on his website:
https://www.math.ubc.ca/~holroyd/comps/pb6.txt