[511] De Rebus Gestis Alexandri Magni, Lib. V, Cap. I.
[512] The Geographical System of Herodotus Examined and Explained, p. 347.
[513] Op. cit., p. 2.
[514] Im Lande des Einstigen Paradieses, p. 30 (Stuttgart, 1903). According to Oppert the great wall of Babylon embraces an area fifteen times as great as that of Paris in 1850 and as extended as that of the entire department of the Seine. Ibid., Vol. I, p. 234.
[515] Op. cit., p. 5.
[516] Op. cit., II, 8.
[517] Koldewey, op. cit., p. 54.
[518] Arrian’s Anabasis of Alexander, Bk. VII, Chap. XXVI.
[519] According to the measurements of Rich, the current of the Euphrates runs at a medium rate of about two knots an hour while that of the Tigris has a maximum velocity of full seven knots.
[520] Commentary on Isaias, Bk. V, Chap. XIII, Patrologiæ Latinæ, Vol. XXIV (Migne, Paris, 1865).