I didn't mean to sound like I was blaming smallclanger; I'm happy to write it off as Just One Of Life's Weird But Boring Mysteries. :-)

Re cataloguing, thanks for the offer, but I think we can probably manage with just the two of us -- and we'll be spending a lot of time dithering about which books are whose and which books go with what & deciding whether we're actually keeping all of them (I know, sacrilege, but there really are Just Too Many, especially if you count the 20 shelves full at O's parents' house and the three bookcases full at my parents' house...). Hope you're not offended!