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260 THE DECLINE AND FALL [Chap, xl emperor Justinian, who invited them to Constantinople ; and, while the one instructed the rising generation in the schools of eloquence, the other filled the capital and provinces with more lasting monuments of his art. In a trifling dispute relative to the walls or windows of their contiguous houses, he had been vanquished by the eloquence of his neighbour Zeno ; but the orator was defeated in his turn by the master of mechanics, whose malicious, though harmless, stratagems are darkly re- presented by the ignorance of Agathias. In a lower room, Anthemius arranged several vessels or cauldrons of water, each of them covered by the wide bottom of a leathern tube, which rose to a narrow top, and was artificially conveyed among the joists and rafters of the adjacent building. A fire was kindled beneath the cauldron ; the steam of the boiling water ascended through the tubes ; the house was shaken by the efforts of im- prisoned air, and its trembling inhabitants might wonder that the city was unconscious of the earthquake which they had felt. At another time, the friends of Zeno, as they sat at table, were dazzled by the intolerable light which flashed in their eyes from the reflecting mirrors of Anthemius ; they were astonished by the noise which he produced from a collision of certain minute and sonorous particles ; and the orator declared in tragic style to the senate, that a mere mortal must yield to the power of an antagonist who shook the earth with the trident of Neptune and imitated the thunder and lightning of Jove himself. The genius of Anthemius and his colleague Isidore the Milesian was excited and employed by a prince whose taste for architecture had degenerated into a mischievous and costly passion. His favourite architects submitted their designs and difficulties to Justinian, and discreetly confessed how much their laborious meditations were surpassed by the intuitive knowledge or celestial inspiration of an emperor, whose views were always directed to the benefit of his people, the glory of his reign, and the salvation of his soul. 102 Founda- The principal church, which was dedicated by the founder of tionofthe church of St. Sophia 102 g ee procopius (de yEdificiie, 1. i. c. 1, 2, 1. ii. c. 3). He relates a coincidence of dreams which supposes some fraud in Justinian or his architect. They both saw, in a vision, the same plan for stopping an inundation at Dara. A stone quarry near Jerusalem was revealed to the emperor (1. v. c. 6) ; an angel was tricked into the perpetual custody of St. Sophia (Anonym, de Antiq. C. P. 1. iv. p. 70 [Script, orig. Cplit. ed. Preger, p. 88]).