That is
brilliant, a-h! Where did you track it down? I`ve love to pass it on to some people. Once I`ve got my eyes and brain untangled!
Mort, I found it by googling "many faces".
As a follow-up I've tried to import Jacques Carelman's Four portraits in one (a "rotatory" picture) which I knew from the Oulipo compendium: the whole compendium used to be online but I can't find it at the moment.
http://www.drunkenboat.com/db8/oulipo/feature-oulipo/para/oupeinpo/carelman/carelman.htmlClick on La rose des tetes - it's the same pic. Can't seem to import it.