De Valera and Quarternions

The picture in theory depicts Pope Gregory IX, but it actually shows the features of Julius II, who went to war on Venice and gave a lot of money to sundry artists. It therefore manages to be a sort of cultural materialist monument to irony, since Gregory invented the idea of non-combatants protected by law (in the form of military chaplains), as well as new ways to persecute Jews and cats.

Wonders never cease. Did anyone out there know of Eamon de Valera's passion for the three dimensional modelling of mathematical space with four dimensional algebra? Lenin could only try and prag Avenarius and Mach. What a big old girlie man he was.