[Footnote 112: Procopius affirms (l. iv. c. 6) that the Danube
was stopped by the ruins of the bridge. Had Apollodorus, the
architect, left a description of his own work, the fabulous
wonders of Dion Cassius (l lxviii. p. 1129) would have been
corrected by the genuine picture Trajan's bridge consisted of
twenty or twenty-two stone piles with wooden arches; the river is
shallow, the current gentle, and the whole interval no more than
443 (Reimer ad Dion. from Marsigli) or 5l7 toises, (D'Anville,
Geographie Ancienne, tom. i. p. 305.)]