Ab urbe condita
Titus Livius (Livy)
Livy. History of Rome, Volumes 1-2. Roberts, Canon, Rev, translator. London, New York: J. M. Dent and Sons; E. P. Dutton and Co., 1912.
The carnage had almost extended to the second line where the standards were stationed when there appeared in the side distance a cloud of dust as though raised by the tread of an immense army. It was Sp. Nautius —some say Octavius Maecius —the commander of the auxiliary cohorts.
They raised a dust out of all proportion to their numbers, for the camp-followers mounted upon the mules were dragging leafy boughs along the ground. At first the arms and standards gradually became visible through the beclouded light, and then a loftier and thicker Cloud of dust gave the appearance of cavalry closing the column.