From January to April 2000 historian David Irving brought a high-profile libel case against Penguin Books and Deborah Lipstadt in the British High Court, charging that Lipstadt's book, Denying the Holocaust (1993), falsely labeled him a Holocaust denier. The question about the evidence for Auschwitz as a death camp played a central role in these proceedings. Irving had based his alleged denial of the Holocaust in part on a 1988 report by...