Roy Davies's book The Darwin Conspiracy contends that Charles Darwin plagiarized his theory of evolution from Edward Blyth, Patrick Matthew, and especially Alfred Russell Wallace. In support of these contentions, Davies offers evidence of similar terminology between Darwin and Blyth/Matthew and mail delivery schedules that allowed Darwin to take advantage of Wallace's letters about evolution. Careful scrutiny of Davies's claims finds them lacking credibility. The similar terminology between Darwin and Blyth/Matthew are inconclusive. Darwin could have derived the incriminating words from other sources. The mail schedules presented by Davies are unverifiable since the letters in question are no longer extant. Given the weakness of Davies's argument, Darwin is unlikely to have plagiarized any component of his theory of evolution by natural selection.