Come we to the _via prætoria_, or principal street of the camp, extending along the middle line from the _prætorium_ to the houses at the Brill; where is the _porta prætoria_ at the _frons castrorum_. The gate between the two houses at the Brill, leading into the pasture there, which pasture was the station of the horse, is in the very line of the _via prætoria_. The front of the camp is bounded by a spring with a little current of water, running from the west, across the Brill, into the Fleet brook: the lane out of the great road, along this spring, terminates in the _frons castrorum_, as an avenue to it; and may be ancienter than the road along the valley, where the river runs, to Pancras. This Brill was the occasion of the road directly from the city originally going along the side of the brook by Bagnigge; the way to Highgate being at first by Copenhagen house, which is the strait road thither from Gray’s-inn lane, and before that of the valley to Pancras, called Longwich in Norden’s _Speculum_. It is not a little remarkable, that the name of _Brill_ should through so many ages preserve the sure memorial of this most respectable monument of Julius Cæsar’s camp. Camden, the Pausanias of Britain, a genius great in his way as Julius Cæsar, takes notice, in Buckinghamshire, “of the ancient Roman burgh, where much Roman money is found, called the _Brill_; which was afterward a royal village of Edward the Confessor’s; and, instead of Bury-hill, is by contraction called _Brill_.” In the additions to Camden’s _Britannia_, Sussex, thus we read: “Hard by Chichester, toward the west, there has been a large Roman camp, called the _Brile_, of an oblong form, four furlongs and two perches in length, two furlongs in breadth: it lies in a flat low ground, with a great rampire and single graff; probably Vespasian’s camp, after his landing.” And the like must be said of the Brill in the Netherlands, probably too one of Cæsar’s camps.