More than once as the controversy over this book unfolded reporters and others told me the number of footnotes in Tierney's chapter on the measles outbreak: 147. I have now tallied the total number of footnores in the entire book including the appendix (1,599). Such numbers seem to interst people. It is considerable more difficult to quantify the evidentiary force and legitimacy of these footnores. My own assessment is perhaps suggested by the fact that I have rewritten this review several times in an effort to make it difficult for anyone to extract a decontextualized endorsement on some future web page or book jacket. This accounts for the somewhat stilted style, for which I apologize.