Five Minutes at Cedar and Church Streets

I was sitting there waiting for Mr S, kinda bored and drifty. Took out my camera and rested it on my knee, and pressed the button at the count of 10 until he reappeared. I was thinking about the street scenes that a few folks have posted recently, and unhappy that this small town view wasn't all that interesting. But a very strange pattern emerged when I sat down later to look at the photos. Can you figure out what it is? You might have to embiggen it to see better...