  Phys and Math are two colleagues at the University of Sa{\c c}enbon (Crefan
Kingdom), dialoguing about the remarkable efficiency of mathematics for
physics. They talk about the notches on the Ishango bone, the various uses of
psi in maths and physics, they arrive at dessins d'enfants, moonshine concepts,
Rademacher sums and their significance in the quantum world. You should not
miss their eccentric proposal of relating Bell's theorem to the Baby Monster
group. Their hyperbolic polygons show a considerable singularity/cusp structure
that our modern age of computers is able to capture. Henri Poincar{\'e} would
have been happy to see it.
