Greenhall’s next book, The Companion (1988), was told from the point of view of an angel of death working for, and occasionally murdering, the elderly. Then came Death Chain (1991), about a cognac salesman surrounded by murder. At some point, Greenhall’s agent vanished, but when the author went looking for new representation, everyone told him he was too old. Undefeated, he went home, sat down, and wrote Lenoir (1998), an elegant historical novel about the black man who posed for Rubens’s Four Studies of the Head of a Negro.