Lydia and Cilicia 500 each (£145,000); Drangiana (the Sarangians and Sagartians) paid 600 talents (£170,000); Egypt with Cyrene, Barca, and the tribes of the Libyans, 700 talents (£200,000); the satrapy of Babylon, _i.e._ the region to the south of the Armenian mountains between the Euphrates and the Tigris as far as the mouth of the rivers, paid 1000 talents (_i.e._ £290,000). This was the highest tax imposed on any satrapy; from this assessment, as well as from other evidence, we may conclude that Babylonia was the best cultivated and most fruitful province in the whole kingdom. The entire income from this satrapy is put by Herodotus at an artabè of silver daily, and the Persian artabè was larger by three choenixes than the Attic medimnus. The artabè, therefore, was about equal to a Prussian bushel, _i.e._ to a measure of 2770 cubic inches.[374] Darius thus received every year from the land-tax of the provinces, 7600 talents of silver in the royal standard, _i.e._ in round figures £2,500,000. To this has to be added the large amount of gold-dust, which the twentieth, or Indian satrapy, paid yearly to the king. This amount, 360 talents according to Herodotus, was not the land-tax of the province; it was obtained from the gold-sands of the Himalayas. This raised the net income of the treasury to a total of about £3,000,000, and to this again have to be added the taxes imposed on Lemnos and Imbros, on the Thracians and the Greek towns on the Thracian coast, with the Macedonians, after the campaign to the Danube, and the tribute in kind paid by the subject tribes among the Arabians (1000 talents of frankincense every year), and the negroes (ivory and ebony), and the tribute in slaves paid by the Colchians (100 boys and 100 virgins every fifth year).