Quite so, thanks. I was, I confess, merely being a wise-ass.

The problem with things that we notice only by their absence, is the overwhelming magnitude of the set. Start a list of things that you can plainly see are not there, and by George, you'll be up all night!!

As for names which escape you, I fully sympathize. Those artful dodgers are too slippery for words. They dig tunnels, adopt disguises, hide in out-bound laundry, smuggle themselves in delivery vans -- ANYTHING to get out of their proper holding area. I have tried redoubling my surveillance and patrols, but it just costs me sleep at night.

A