Tan-and-white beagle mix found near library

I found a friendly dog this afternoon around 4:15pm wandering near the Potsdam Public Library on Park Street. It's a beagle mix, about 25 pounds, tan with a white chest and a white-tipped tail, wearing a blue harness and a round metal tag that says Milo. He seems well-cared for, wagging his tail and soaking up ear rubs, and he has a small notch scar on his right hind leg. I checked for a microchip but didn't see one. I brought him to a safe spot by the library steps and I'll stay here to help reunite him with his family; if this is your dog, I'm here to help get him home.