20th and 21st century, new information about the revolt has come to light, from the discovery of several collections of letters, some possibly by Bar Kokhba himself, in the Cave of Letters overlooking the Dead Sea. These letters can now be seen at the Israel Museum. Ideology and language According to Israeli archaeologist Yigael Yadin, Bar Kokhba tried to revive Hebrew and make Hebrew the official language of the Jews as part of his messianic ideology. In A Roadmap to the Heavens: An Anthropological Study of Hegemony among Priests, Sages, and Laymen (Judaism and Jewish Life) by Sigalit Ben-Zion (page 155), Yadin remarked: "it seems that this change came as a result of the order that was given by Bar Kokhba, who wanted to revive the Hebrew language and make it the official language of the state." Character Talmud Simon bar Kokhba is portrayed in rabbinic literature as being somewhat irrational and irascible in conduct. The Talmud says that he presided over an army of Jewish insurgents numbering some 200,000, but had compelled its young recruits to prove their valor by each man chopping off one of his own fingers. The Sages of Israel complained to him why he marred the people of Israel with such blemishes. Whenever he would go forth into battle, he was reported as saying: "O Master of the universe, there is no need for you to assist us [against our enemies], but do not embarrass us either!" It is also said of him that he killed his maternal uncle, Rabbi Elazar Hamudaʻi, after suspecting him of collaborating with the enemy, thereby forfeiting Divine protection, which led to the destruction of Betar in which Bar Kokhba himself also perished. Hadrian is thought to have personally supervised the closing military operations in the siege against Betar. When the Roman army eventually took the city, soldiers carried Bar Kokhba's severed head to Hadrian, and when Hadrian asked who it was that killed him, a Samaritan replied that he had killed him. When Hadrian requested that they bring the severed head (Latin:protome) of the slain victim close to him that he might see it, Hadrian observed that a serpent was wrapped around the head. Hadrian then replied: "Had it not been for God who killed him, who would have been able to kill him!?" Eusebius Bar Kokhba was a ruthless leader, punishing any Jew who refused to join his