4.23
Assume, however, that the total number of slaves to begin with is twelve hundred. By using the revenue derived from these the number might in all probability be raised to six thousand at the least in the course of five or six years. Further, if each man brings in a clear obol a day, the annual revenue derived from that number of men is sixty talents.
4.24
Out of this sum, if twenty talents are invested in additional slaves, the state will have forty talents available for any other necessary purpose. And when a total of ten thousand men is reached, the revenue will be a hundred talents.
4.25
But the state will receive far more than that, as anyone will testify who is old enough to remember how much the charge for slave labour brought in before the trouble at Decelea.In 413 B.C., when great numbers of slaves deserted, and labour in the mines dwindled. And there is another proof. During the history of the mines an infinite number of men has worked in them; and yet the condition of the mines to-day is exactly the same as it was in the time of our ancestors, and their memory ran not to the contrary.
4.26
And present conditions all lead to the conclusion that the number of slaves employed there can never be greater than the works need. For the miners find no limit to shaft or gallery.
4.27
And, mark you, it is as possible now to open new veins as in former times. Nor can one say with any certainty whether the ore is more plentiful in the area already under work or in the unexplored tracts.
4.28
Then why, it may be asked, are fewer new cuttings made nowadays than formerly? Simply because those interested in the mines are poorer. For operations have only lately been resumed, and a man who makes a new cutting incurs a serious risk. If he strikes good stuff he makes a fortune; but if he is
4.29
disappointed, he loses the money he has spent. Therefore people nowadays are very chary of taking such a risk.
