For the past two days, a charcoal-gray tabby cat has strolled across the patio in front of the door next to which I sit while I work. Today I managed to get up and open the door before he got out of my field of vision. When I opened the door a crack, he scampered under the front barn and disappeared. Mrs. Orr and I were talking about him last night after I told her about seeing him, and she remarked that he would be welcome if he were a good mouser and could pull his own weight. This morning at about 0400, Bluebelle, she of the keen ears and…