Then he descended the aqueduct slowly. Those whom he had summoned followed, not without hesitation, but with a certain confidence which his calmness had given them. Petronius, halting at the foot of the arches, gave command to bring him a white horse, and, mounting, rode on, at the head of the cavalcade, between the deep ranks of pretorians, to the black, howling multitude; he was unarmed, having only a slender ivory cane which he carried habitually.