I found four of them on the floor when I walked into the room with the file cabinet, today. One was splayed open across a wrought-iron mirror, another was face-down and open, the remaining two fortunately landed flat. I was so shocked to find them on the floor that I actually gasped aloud. I picked them up, closed them and then asked my husband which file drawers he'd messed around in. He'd been in three out of four -- and couldn't remember which three. That meant I had to go digging for the rest of the books but I finally located them all. Some are in better condition than others.
I'm going to do a little research to see if I can find out how to better protect these little gems. I know absolutely nothing about the preservation of antiquarian books. Do you? If so, please share!