It seems only civilized that every expiring political secret should get a decent burial.... ...So why did many Deep Throat researchers -- especially insiders -- reject the idea of Mr. Felt? Because much information that Deep Throat provided was a matter less of specific facts about the Watergate investigation than about the nature of the Nixon White House. Deep Throat talked about the clockwork craziness the White House had become, about the sound of Nixon angry and the character of individuals involved in the cover-up. These insights were presented with the certainty of personal experience. But they were not within...