The historians' history of the world in twenty-five volumes, volume 02
CHAPTER IV. THE PERSIAN DYNASTY: DARIUS I TO DARIUS III
[b] EDUARD MEYER, _op. cit._
[c] HERODOTUS, _op. cit._
[d] H. C. RAWLINSON, _The Persian Cuneiform Inscription at Behistun_.
[e] G. MASPERO, _op. cit._
[f] DIODORUS, _Historical Library_.
[g] XENOPHON, _op. cit._