Was just heading off to bed when I saw a grey item whisk across the rug followed by a black cat, both quiet as shadows. They ran down the basement stairs, one going under a set of metal shelves and the other circling frantically. Went down to see if I could effect a rescue. He ran up the wall and paused, grey with pink nose and feet. I went for a jar to carry him in and he was gone when I looked again. Nothing to do but set the live trap, name him and go to bed. Good night John boy, good night lil Hickory.