It's all about learning folks.
Now I have to say, I contacted these folks, at AAA Wildlife Control who you can watch on the National Georgraphic Channel apparently and they were VERY helpful.
Here's the drill for tonight.
I'll go in this evening and make a bunch of noise in the basement, then I sprinkle flour around near the cat flap and other higher traffic areas. Then close the basement door and leave. I am supposed to come back later near or after dark and check for footprints and close the flap.
I'll check again for footprints in the morning.
Flour, the raccoon hunter's best friend. Wonder if I have any. The clean up should be a joy, but well worth it.
We'll be sleeping elsewhere tonight. Meeting a raccoon in the hallway outside the bathroom is a mite disconcerting.