Anyway, this Abacus Cube Roots page is by him and someone else in his abacus group. I won’t pretend to understand it, but from what he’s said about working it out, it sounds pretty impressive and like something he’s been trying to get right for a long time.

And I somehow figure that given the sorts of people who read my blog, some of you might just find this interesting. 😉

(Edited to add: Shane suggested Totton’s home page as a good place to start if you’re looking for more basic information than the advanced cube root stuff, and also apparently keys to the diagrams.)