Milestones, they are more numerous than needed. They may tell very little, often merely certifying stages and intervals on roads already known, traced and trodden: or, less instructive, the names and titles of an emperor.
There are happy exceptions. From time to time the miliaria, by registering an imperial legate, contribute usefully to the study of the governing class. A new discovery can offer a sudden and welcome illumination. For example, the milestone set up on a strategic road in Palestine in the second half of the year 69: the road from Caesarea by Caparcotna to Scythopolis. At the head stands the name of the pretender, styled ‘Imp. Caesar Vespasianus Augustus’, and this stone was erected by M. Ulpius Traianus, the legate commanding the legion X Fretensis.
The document is variously instructive, not least for the career of that legate. In the narrative of Josephus, Traianus was last heard of in the early summer of 68 when, after the subjugation of Peraea, he brought his army corps to join Vespasian at Jericho. The next fact is his consulate in 70, revealed by a small fragment of the Fasti Ostienses. He followed as suffectus the great Licinius Mucianus (the second consulship of that person). The honour was deserved. Like another legionary legate, Aurelius Fulvus, who commanded III Gallica in Moesia, Ulpius Traianus (the inference is easy and painless) had a hand in the intrigue that led to the proclamation of Vespasian. Both were legates of some seniority. Fulvus is attested in 64, under Domitius Corbulo in Armenia (ILS 232).