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"A light open carriage with two wheels, adapted to carry two persons rapidly from place to place. The cisia were quickly drawn by mules. Cicero mentions the case of a messenger who travelled 56 miles in 10 hours in such vehicles, which were kept for hire at the stations along the great roads; a proof that the ancients considered six Roman miles per hour as an extraordinary speed." — Smith, 1873

Cisium

"A light open carriage with two wheels, adapted to carry two persons rapidly from place to place. The…