Flavius Josephus, The Wars of the Jews
William Whiston, A.M., Ed.

[47] NOW, as Titus was upon his march into the enemy's country, the auxiliaries that were sent by the kings marched first, having all the other auxiliaries with them; after whom followed those that were to prepare the roads and measure out the camp; then came the commander's baggage, and after that the other soldiers, who were completely armed to support them; then came Titus himself, having with him another select body; and then came the pikemen; after whom came the horse belonging to that legion. All these came before the engines; and after these engines came the tribunes and the leaders of the cohorts, with their select bodies; after these came the ensigns, with the eagle; and before those ensigns came the trumpeters belonging to them; next these came the main body of the army in their ranks, every rank being six deep; the servants belonging to every legion came after these; and before these last their baggage; the mercenaries came last, and those that guarded them brought up the rear. Now Titus, according to the Roman usage, went in the front of the army after a decent manner, and marched through Samaria to Gophna, a city that had been formerly taken by his father, and was then garrisoned by Roman soldiers; and when he had lodged there one night, he marched on in the morning; and when he had gone as far as a day's march, he pitched his camp at that valley which the Jews, in their own tongue, call "the Valley of Thorns," near a certain village called Gabaothsath, which signifies "the Hill of Saul," being distant from Jerusalem about thirty furlongs. ¹ There it was that he chose out six hundred select horsemen, and went to take a view of the city, to observe what strength it was of, and how courageous the Jews were; whether, when they saw him, and before they came to a direct battle, they would be affrighted and submit; for he had been informed what was really true, that the people who were fallen under the power of the seditious and the robbers were greatly desirous of peace; but being too weak to rise up against the rest, they lay still.