A short piece which mixes up historical facts/pseudo-facts from Greek history with rich imagination to discuss the discovery of irrational numbers (Pythagoras, Hippasus), the vanishing point in perspective geometry and the representation of 3-dimensional drawings on planar surface. This forms the spring-board for the mystical leap by one “architectural apprentice named Cretheus” who decides to invent the geometrical technique to avoid the “optical foreshortening” of perspective drawing, with startling effect. To quote, “he demonstrates that it is indeed possible to eradicate the heathen numbers embedded in our visual universe — so long as the mind is fit to create its own.”