At Roy's direction, I got a screwdriver and needle-nose pliers. As I knelt on the blue bathrug, what did I find but....
...yeah. *sigh*
The other one is visible. That's good. But it's in just the wrong spot for my pliers to get it and I'm too afraid I'll knock it the rest of the way into the drain. Have covered and protected the hole, shut the bathroom door so curious kitties will stay away, and Roy will come home and make an attempt at unscrewing the copper sink to get to the space beneath where the shiny awaits.
Idiot. Idiot. Idiot.