I have, after many hours, a complete grid apart from 6 gaps, presumably found via the endgame. There are four writers involved: is the quotation by one of them? Is it in ODQ (I have hunted, but without success)? I have the shape and its size - nicely clued and arithmetically almost exact - and a mere 36 cells in which the centres will be located, Stare, stare, I have gone. But nothing.