In the year 503, after the disastrous campaign which witnessed the fall of Amida and the failure to recapture Nisibis, the Emperor Anastasius took his generals severely to task "for that they did not prosper nor succeed in the war according to his will under the Lord." The unfortunate generals protested that they could not reasonably expect to defeat a potentate who was manifestly commissioned by Providence to chastise the backsliding Romans--especially when he had such a large army. But they closed their jeremiads with one eminently practical suggestion viz.--that it was quite hopeless to attack Nisibis unless they had a strong base of operations close by. This notion appealed to Anastasius--a great believer in fortification, and the builder of the famous "Long Walls," the Byzantine Lines of Tchatalja. After some consideration he fixed upon Daras as the site of his new fortress; and (as it was church property) he bought it honestly, and commissioned Thomas, the Bishop of Amida, to undertake the contemplated work. The commander of the covering army was one Felicissimus, of whom it is significantly chronicled that "he was not at all covetous;" but all the engineering work seems to have been supervised by the bishop. Anastasius supplied him with money freely, and engaged that neither he nor his successors should demand any accounts of the expenditure--which seems rather an extreme test even of a bishop's integrity. He specially stipulated, however, that none of the workmen should be defrauded of their wages, having ascertained (no doubt by a system of trial and error) that "cities (on the frontier) got built quicker that way." It is worthy of remark that a day's wage at that time was 4 _keratin_ (2_d._)[32] and that the services of an ass were rated as precisely equivalent to a man's. Upon these principles the work progressed rapidly, and the city was finished in three years; Kobad being engaged upon his eastern frontier, and quite unaware of what was going on.