Seventh-day Adventists are also called Adventists and SDAs. The origin of the Seventh-day Adventists can be traced to the Millerite Movement of the 19th Century. This movement was largely responsible for what has been called the Great second advent awakening. William Miller (1782-1849) was a farmer who settled in upstate New York after the war of 1812. He was originally a Deist (a person who believes that God created the universe but has not been actively involved since). After two years of private Bible study, Miller converted to Christianity and became a Baptist lay leader. He was convinced that the Bible contained coded information about the end of the world and the Second Coming of Jesus. He also realized that he had an obligation to teach his findings to others. In 1831, he started to preach. In 1833, he published a pamphlet on end-time prophecy. In 1836, his book Evidences from Scripture and History of the Second Coming of Christ about the Year 1843 was published. After one of his key prophecies failed to materialize, Miller withdrew from the leadership of his group of followers (who called themselves Adventists) and died in 1849. Ellen Harmon, who married James White, became members of a small group in Washington, New Hampshire, who organised themselves into the first Seventh-day Adventist Church in 1863.