Pliny the Younger (A.D. 62?c.A.D. 113). Letters. The Harvard Classics. 190914.
XLVI. To the Emperor Trajan
THE CITIZENS of Nicomedia, Sir, have expended three million, three hundred and twenty-nine sesterces1 in building an aqueduct; but, not being able to finish it, the works are entirely falling to ruin. They made a second attempt in another place, where they laid out two millions.2 But this likewise is discontinued; so that, after having been at an immense charge to no purpose, they must still be at further expense, in order to be accommodated with water. I have examined a fine spring from whence the water may be conveyed over arches (as was attempted in their first design) in such a manner that the higher as well as level and low parts of the city may be supplied. There are still remaining a very few of the old arches; and the square stones, moreover, employed in the former building, may be used in turning the new arches. I am of opinion part should be raised with brick, as that will be the easier and cheaper material. But that this work may not meet with the same ill success as the former, it will be necessary to send here an architect, or someone skilled in the construction of this kind of waterworks. And I will venture to say, from the beauty and usefulness of the design, it will be an erection well worthy the splendour of your times.