Res Gestae
Ammianus Marcellinus
Ammianus Marcellinus. Ammianus Marcellinus, with an English translation, Vols. I-III. Rolfe, John C., translator. Cambridge, MA; London: Harvard University Press; W. Heinemann, 1935-1940 (printing).
Anaximander says that when the earth dries up after excessive summer drought, or after soaking rainstorms, great clefts open, through which the upper air enters with excessive violence; and the earth, shaken by the mighty draft of air through these, is stirred from its very foundations. Accordingly such terrible disasters happen either in seasons of stifling heat or after excessive precipitation of water from heaven. And that is why the ancient poets and theologians call Neptune (the power of the watery element) Ennosigaeos[*](Earthshaker, Juv. x. 182) and Sisichthon.[*](Earthquaker, Gell. ii. 28, 1.)