Fortunately, her choice of wearing apparel gave her away. Had she been all in black, I probably would have missed her, especially if she'd closed her eyes - but the whispy grey was ghostly, shining in the darkness.
Yes - it was the Illegal Alien Kitteh. Finally spotted. This time not at the window in the livingroom where it had torn the crap out of screens (the new anti-pet screening seems to be working) - but on top of the neighbor's roof. I hissed at it. She scooted back a few steps, but kept looking at the window. I hissed again, louder and raised my hand... she scampered off. I closed the window down over the screen.
This morning there are 2 small holes in the screen. I have put a spray bottle of CleanUp on the windowsill. Fucking cat comes back, it will get a face full of Chlorox.
I am NOT happy with this little housebreaker.