This morning, K sent to me out to look for one on the front roof. He was there on the gutter. Presently, he clambered back up the slate at the southwest corner and disappeared over the roof. When I got to the back yard, he was in the holly tree at the northeast corner, about to head down.
For now, I assume that this squirrel is foraging for acorns that have fallen from a neighbor's tree into our gutters. I would find it more restful if he didn't, and perhaps once he satisfies himself that the acorns are gone, he won't. If he looks for storage or nesting space in the attic, he may find himself transported to Four Mile Run.
The other day I thought that I heard woodpeckers at our rake boards. This would have meant woodpecker damage to repair and bug infestation to deal with. Once I opened an attic window, I could hear that the hammering was from a crew down the alley.