By the time they had visited all the places that Carroll frequented, they had unravelled an astonishing code whereby the Oxford mathematician laced his famous 'Alice' stories with clues to his scurrilous views on 'the great and the good' of Victorian England
I don't think I knew Lewis Carroll was a mathematician?
Mobius strip, eh?
It sounds like nonsense, but underneath it there’s a pattern involving a progression of number bases (and in this progression, she really doesn’t ever get to 20). Arithmetic turns up in the poem “The Hunting of the Snark,” and a Möbius strip appears in Carroll’s last novel, Sylvie and Bruno Concluded. And throughout the Alice books and Dodgson’s other work writing as Lewis Carroll, logical absurdities create much of the humor, as in this exchange between Alice and the White King in Alice Through the Looking Glass:
Carroll’s last novel, Sylvie and Bruno Concluded?
https://archive.ph/WuCGF
https://en.wikipedia.org/wiki/Sylvie_and_Bruno
Chapter 21
Sylvie asks the Professor for advice. He unlocks the Ivory Door for the two of them, and they meet Bruno. The Professor boasts of having devised the Emperor's new Money Act, doubling the value of every coin to make everyone twice as rich, and shows the narrator an "Outlandish" watch (essentially a kind of time machine). Sylvie finds a dead hare, and is horrified to learn that human beings hunt them.
Chapter 24
Sylvie and Bruno present a variety show to an audience of frogs, including "Bits of Shakespeare", and Bruno tells them a long rambling story.