This is the Rev. Clarence Larkin's guide to the Book of Revelation. Larkin, who published several books about biblical studies in the 1910s and 20s, was a 'Dispensationalist,' one of the threads of modern Evangelical Christianity. The predecessor of Larkin is J.N. Darby, the founder of Dispensationalism, and among his many successors are Hal Lindsay, and the Left Behind books.