Chapter 21, How I Tried to Teach the Theory of Three Dimensions to My Grandson, and with What Success Summary

A. Square wakes from his dream, excited to spread the word of the third dimension. However, shortly afterwards he hears the crier in the streets, declaring the new law regarding those who speak of a third dimension. Square suddenly decides to instead proceed with a demonstration of the third dimension, rather than the proclamation of such, and determines his grandson is the best pupil. He tells his wife a false story of why the Circle earlier appeared, and then sends for his grandson. He repeats the lessons from the previous evening, and then asks the young boy to say again his theory of 'upward, not northward'. The boy begins...