The white flag A, which served as the starting point of the whole construction, marked the position of the consul’s tent, or _praetorium_, so called because _praetor_ was the ancient term for any one invested with supreme command. A square area was left open, extending a hundred feet each way from the praetorium. The camp was divided into two parts, the upper and the lower. The upper part formed about a third of the whole. In it was the _praetorium_ (A) or general’s tent. A part of the praetorium was called the _Augurale_, as the auguries were there taken by the general. On the right and left of the praetorium were the _forum_ and _quaestorium_; the former a sort of market-place, the latter appropriated to the quaestor and the camp stores under his superintendence. On the sides of and facing the forum and quaestorium, were stationed select bodies of horse (K) taken from the extraordinaries, with mounted volunteers, who served out of respect to the consul, and were stationed near him. And parallel to these were posted similar bodies of foot-soldiers (L). Before the quaestorium and the forum were the tents of the twelve tribunes of the two legions (B), and before the select bodies of horse and infantry the tents of the praefecti sociorum were probably placed (C). Again, behind the praetorium, the quaestorium, and the forum, ran a street or _via_ (D), 100 feet broad, from one side of the camp to the other. Along the upper side of this street was ranged the main body of the “extraordinary” horse (M): they were separated into two equal parts by a street fifty feet broad (E). At the back of this body of cavalry was posted a similar body of infantry (N), selected from the allies, and facing the opposite way, _i.e._ towards the ramparts of the camp. The vacant spaces (O) on each side of these troops were reserved for foreigners and occasional auxiliaries. The lower part of the camp was divided from the upper by a street, called the _Via Principalis_ (V P), or _Principia_, a hundred feet broad. Here the tribunal of the general was erected, from which he harangued the soldiers, and here the tribunes administered justice. Here also the principal standards, the altars of the gods, and the images of the emperors were placed. The lower part of the camp was occupied by the two legions and the troops of the allies according to the arrangement of the preceding cut. Between the ramparts and the tents was left a vacant space of 200 feet on every side, which was useful for many purposes: thus it served for the reception of any booty that was taken, and facilitated the entrance and exit of the army. The camp had four gates, one at the top and bottom, and one at each of the sides; the top or back-gate, which was the side most away from the enemy, was called the _decumana_. The bottom or the front gate was the _practoria_, the gates of the sides were the _porta principalis dextra_, and the _porta principalis sinistra_. The