Case in point.
a) not small. Not at all.
b) not light. Not in the slightest.
c) not identified. Attic vent?
it also was
a) $10 at the Habitat store:
b) exactly the right size to fill up some space on a library wall:
c) interesting? Maybe.
Whateveritis is undergoing it's little presto-change-o right now. I'll keep you posted.