A Dr. Seuss Collaborator’s N.Y.C. Townhouse Lists for $13.5 Million

Ever wish walls could talk? If the ones within this Upper East Side townhouse long owned by the late Phyllis Cerf Wagner could indeed speak, they most assuredly would have their share of fascinating tales to spin. Think stories of all the famous guests from Judy Garland to Frank Sinatra who visited the historic premises at some point during a 60-plus-year tenure that saw the Manhattan socialite, onetime movie actress, and collaborator with Dr. Seuss on a series of landmark children’s…