If a book by an author who must call herself a veteran should be taken up by readers of a younger generation, they are begged to consider the first few chapters as a sort of prologue, introduced for the sake of those of elder years, who were kind enough to be interested in the domestic politics of the Mohuns and the Underwoods. Continuations are proverbially failures, and yet it is perhaps a consequence of the writer's realization of characters that...