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 258 THE DECLINE AND FALL [Chap, xl [a.d.543] remnant of his fortunes ; he was transported in a bark to the place of his banishment at Antinopolis in Upper Egypt, and the praefect of the East begged his bread through the cities which had trembled at his name. During an exile of seven years, his life was protracted and threatened by the ingenious cruelty of Theodora ; and, when her death permitted the emperor to recal a servant whom he had abandoned with regret, the ambition of John of Cappadocia was reduced to the humble duties of the sacerdotal profession. His successors convinced the subjects of Justinian that the arts of oppression might still be improved by experience and industry ; the frauds of a Syrian banker were introduced into the administration of the finances; and the example of the praefect was diligently copied by the quaestor, the public and private treasurer, the governors of provinces, and the principal magistrates of the Eastern empire. 94 His edifices V. The edifices of Justinian were cemented with the blood tects archl and treasure of his people ; but those stately structures appeared to announce the prosperity of the empire, and actually displayed the skill of their architects. Both the theory and practice of the arts which depend on mathematical science and mechanical power were cultivated under the patronage of the emperors ; the fame of Archimedes was rivalled by Proclus and Anthemius ; and, if their miracles had been related by intelligent spectators, they might now enlarge the speculations, instead of exciting the distrust, of philosophers. A tradition has prevailed that the Roman fleet was reduced to ashes in the port of Syracuse by the burning-glasses of Archimedes ; 95 and it is asserted that a similar expedient was employed by Proclus to destroy the Gothic vessels in the harbour of Constantinople, and to protect his benefactor Anastasius against the bold enterprise of Vitalian. 96 A machine 94 The chronology of Procopius is loose and obscure ; but with the aid of Pagi I can discern that John was appointed praetorian praefect of the East in the year 530 ; that he was removed in January 532 — restored before June 533 — banished in 541 [to Cyzicus] — and recalled between June 548 and April 1, 549. Aleman. (p. 96, 97) gives the list of his ten successors — a rapid series in a part of a single reign. 95 This conflagration is hinted by Lucian (in Hippia, c. 2) and Galen (1. iii. de Temperamentis, torn. i. p. 81, edit. Basil) in the second century. A thousand years afterwards, it is positively affirmed by Zonaras (1. ix. p. 424) on the faith of Dion Cassius, by Tzetzes (Chiliad, ii. 119, &c), Eustathius (ad Iliad. E. p. 338), and the scholiast of Lucian. See Fabricius (Bibliot. Grose. 1. iii. c. 22, torn. ii. p. 551, 552), to whom I am more or less indebted for several of these quotations. 96 Zonaras (1. xiv. p. 55 [c. 3]) affirms the fact, without quoting any evidence. [He seems to have followed George Monachus here (ed. de Boor, ii. 619), but to have added the artifice of the mii-ror, out of his own head.]