Leaning Stone House of Princeton?

So, the following discussion occurred over the weekend while working on the bathroom.

The husband is putting together the half-wall. He has measured and even has a level working in the process-- the half wall stud structure looks terrific.

The husband has cut a piece of drywall to go on the outside of the half-wall.... he lines it up and it is mysteriously not plumb. In the middle of joint compounding, I look over and see that the top of the cut piece of drywall is the finished edge.

I say, with much authority, "well the finish edge on the top-- it should go on the bottom, maybe your cut isn't straight...."

then looking at it for another minute (the college degree wasn't kicking in very fast...) I realize that regardless of whether the cut edge is straight or not the top of the piece of drywall is aligned perfectly with the stud that frames out the top of the half-wall. The drywall meets the edge of the house at floor level, but then is about an inch and a half or two inches off plumb half way up the exterior wall.

For those of you who don't know, our house is *very* close to the road, but we have a large backyard.

I see this and say-- "Oh, the floor must be sagging-- look at it, its not straight."

The husband looks at this discrepancy and says: "The house is leaning." --our house is made of stone--

My response: "Like the Leaning tower of Pisa?" followed by, "at least its leaning away from the road."

Finally, once the level is actually used the husband concedes-- "I guess you're right, the floor is sagging."

Can't wait to see what happens when we bring in the 350 pound cast iron tub!