I'm starting to feel a little more sane now.
In vacuuming out the old place yesterday, I found the last three marbles lost in the Great Marble Disaster of Ought-One.
The scene of the disaster: my basement stairwell. The victim: A giant cylindrical vase full of glass marbles on top of the fridge. The culprit: The minor vibrations of the fridge door opening and closing, causing the vase to slowly and silently creep farther and farther back. The disaster: The last fateful fridge-door slam, which sent the vase off the back of the fridge and down the stairwell, where it shattered into a million tiny slivers of glass and scattered a hail of marbles to every corner of the basement.
Add to that a couple of curious dogs running over with me: "What was that?!? Let's see! Let's see!" And me yelling "Stay back! No! Back! Back!"
Needless to say, I have been finding marbles in every corner since then. These are the last three. An appropriate end to the last three months of madness.