In which Charis and Sharon return (at last!) to Wilvercombe, where Harriet Vane is joined by a familiar monocled face. Their discussion takes them through Chapter 8, including a summation of the evidence gathered so far, mild raptures over witty dialogue and the detective partnership of Peter and Harriet, and the question of taste, style, and class--when the distinction matters, and to whom.    This episode covers the fourth through eighth chapters of HAVE HIS CARCASE and does not give away the whodunnit.