In memory of Charles Rosen:

IMAGE- Herbert John Ryser, 'Combinatorial Mathematics' (1963), page 1

Related material:

The Magic Square in Doctor Faustus  (October 10th, 2012)

Elementary Finite Geometry (August 1st, 2012)

The Space of Horizons (August 7th, 2012)

Chromatic Plenitude (Rosen on Schoenberg)

IMAGE- Charles Rosen on 'a final demarcation of form'