Nestled amid a copse of trees at the summit of a hill, this veranda-ringed farmhouse was built in 1837 as the centerpiece of a 300-acre plantation. It was converted into a B&B in 1983 by Hamilton ("Ham") Schwartz, a hardworking schoolteacher and soccer coach from Philadelphia. Guest rooms are high ceilinged and outfitted with an eclectic mix of antiques. They include old-fashioned beds, which...