There are lots of comedic and intellectual attempts to show how the Peanuts characters age – and generally, they are faux comedic or faux intellectual. (I’d place “Riot On Cell Block P”, which can be read for free here or downloaded to your Kindle for 99 cents, into that latter category.) But I’ve got to give Gene Weingarten and David Clark points for having introduced a grown-up Peanuts character into their strip “Barney & Clyde” – and only realizing it after the fact.