They went away! I can breathe easier now. I don't mean that metaphorically, either.
Today Tara took most of the National Geographics away to her house, to see about integrating them with her own collection. I personally think that's crazy, but, well, that's her business (and her house). My mother took the remaining three piles of duplicates out to her art studio, where they can sit on a shelf out there for years if she likes, since that is her space and it does not affect me, unlike the house. At any rate they are no longer in here, sitting around being dusty and moldy and contributing to the allergies I 'mysteriously' developed a couple years ago.
I'm sorry I didn't get any before and after shots; my camera is rather on the fritz. Lately it's been taking pictures that look like this:
As you can see, not very helpful. (Luckily it's a known problem with one of the chips in it, and the maker will repair it for free, though it's long since out of warranty. They even sent me a pre-paid UPS label to put on it, so I don't have to pay postage.) You'll just have to take my word for it that there is now an empty space on the living room floor, an empty spot on top of one of the bookcases in the living room, and three large empty shelves in one of the bookcases in the piano room.
And I already know, despite my worries about what to do with them, that I won't miss them for an instant.
Now on to the actual books.