The two principal historical sources covering Harmodius and Aristogeiton are the "History of the Peloponnesian War" (VI, 56–59) by Thucydides, and "The Constitution of the Athenians" (XVIII) attributed to Aristotle or his school. However, their story is documented by a great many other ancient writers, including important sources such as Herodotus and Plutarch. Herodotus claimed that Harmodius and Aristogeiton presumably were "Gephyraeans" (el) i.e. Boeotians of Syrian or Phoenician origin. Plutarch, in his book "On the malice of Herodotus" criticized Herodotus for prejudice and misrepresentation and he argued that Harmodius and Aristogeiton were Euboeans or Eretrians.