The historians' history of the world in twenty-five volumes, volume 02
CHAPTER II. THE MEDIAN OR SCYTHIAN EMPIRE
[b] HERODOTUS, _op. cit._
[c] THEODORE NÖLDEKE, article “Persia,” in the _Encyclopædia Britannica_.
[d] A. H. SAYCE, _The Higher Criticism and the Monuments_.
[e] The Holy Bible.
[f] R. W. ROGERS, _History of Babylonia and Assyria_.
[g] CTESIAS, _Persica_.
[h] BEROSUS, _Βαβυλωνικά_.
[i] STRABO, _Γεωγραφικά_.