This is what used to be holding up my house.
Yes, it is a small square of wood. The middle wall of the house was apparently held up solely by that piece of wood and this almost-completely-gone sill plate:
As you might guess, the big project right now is rebuilding that wall. On the plus side, since we have to rebuild it anyway, Don has agreed to my Craftsman-style redesign, which will create a little more open space.
More on the process tomorrow. With action shots!