Marquand Park is a beautiful 19th-century jewel that’s around the corner from me. When I walk into the park with my dog, I am always greeted by a cheerful buzz of activity. Small children bake pies in the sandbox, bigger kids twirl in feverish circles on their tricycles. When it starts to drizzle, everyone quickly gathers their things and vanishes. As the park falls empty and silent, I tug up the collar of my raincoat and walk my dog through the greensward on Magnolia Hill.