From Peter J. Cameron's
Parallelisms of Complete Designs (pdf)–

Epigraph by Eliot on Little Gidding in Cameron's 'Parallelisms'

"…the Feast of Nicholas Ferrar
  is kept on the 4th December."

— Little Gidding Church

Cameron's is the usual definition
of the term "non-Euclidean."
I prefer a more logical definition.