6:6 The land of the north: So Babylon is called; because it lay to the north in respect of Jerusalem. The black horses, that is, the Medes and Persians: and after them Alexander and his Greeks, signified by the white horses, went thither because they conquered Babylon, executed upon it the judgments of God, which is signified, ver. 8, by the expression of quieting his spirit.--Ibid. The land of the south. . .Egypt, which lay to the south of Jerusalem, and was occupied first by Ptolemeus, and then by the Romans.