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[ For the city and pass of Derbend, see D’Herbelot, (Bibliot. Orient. p. 157, 291, 807,) Petit de la Croix. (Hist. de Gengiscan, l. iv. c. 9,) Histoire Genealogique des Tatars, (tom. i. p. 120,) Olearius, (Voyage en Perse, p. 1039—1041,) and Corneille le Bruyn, (Voyages, tom. i. p. 146, 147:) his view may be compared with the plan of Olearius, who judges the wall to be of shells and gravel hardened by time.]
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[ Procopius, though with some confusion, always denominates them Caspian, (Persic. l. i. c. 10.) The pass is now styled Tatar-topa, the Tartar-gates, (D’Anville, Geographie Ancienne, tom. ii. p. 119, 120.)]
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[ Malte-Brun. tom. viii. p. 12, makes three passes: 1. The central, which leads from Mosdok to Teflis. 2. The Albanian, more inland than the Derbend Pass. 3. The Derbend—the Caspian Gates. But the narrative of Col. Monteith, in the Journal of the Geographical Society of London. vol. iii. p. i. p. 39, clearly shows that there are but two passes between the Black Sea and the Caspian; the central, the Caucasian, or, as Col. Monteith calls it, the Caspian Gates, and the pass of Derbend, though it is practicable to turn this position (of Derbend) by a road a few miles distant through the mountains, p. 40.—M.]
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[ The imaginary rampart of Gog and Magog, which was seriously explored and believed by a caliph of the ninth century, appears to be derived from the gates of Mount Caucasus, and a vague report of the wall of China, (Geograph. Nubiensis, p. 267-270. Memoires de l’Academie, tom. xxxi. p. 210—219.)]
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[ See a learned dissertation of Baier, de muro Caucaseo, in Comment. Acad. Petropol. ann. 1726, tom. i. p. 425-463; but it is destitute of a map or plan. When the czar Peter I. became master of Derbend in the year 1722, the measure of the wall was found to be 3285 Russian orgyioe, or fathom, each of seven feet English; in the whole somewhat more than four miles in length.]