I learned some eye-opening things about Charles Hinton. He was convicted and imprisoned for bigamy. Not entirely surprising, as his father James was an advocate of the practice. Just a chip off of the old block. However as an excon he was unemployable in the UK so he lit off for Yokohama(!) to teach English. Some things never change. He did have the offsetting good fortune of being a brother-in-law of George Boole's daughter Alicia Stott. She learned Hinton's system of 4D cubes, made notable models of some of the 4D Platonic solids, and in concert with one of Charles' old Oxford University buddies had enough mojo to get his book A New Era of Thought published.
https://www.sciencefocus.com/science/th ... rd-hinton/