Cumming also took a deep interest in Christian eschatology, adhering to the Historicist school of Christian eschatology. He believed that historical events such as the French Revolution and the Great Famine of Ireland had fulfilled prophecies contained in the biblical Books of Daniel and Revelation. He preached that the sixth vial of judgment (discussed in Revelation 16) had been poured out in 1820. Cumming therefore taught that Judgment Day would occur some time between 1848 and 1867.