The Prophecies of Daniel are all of them related to one another, as if they were but several parts of one general Prophecy, given at several times. The first is the easiest to be understood, and every following Prophecy adds something new to the former.
Vol. I, Ch. 3: Of the vision of the Image composed of four Metals - Observations upon the Prophecies of Daniel, and the Apocalypse of St. John (1733)