Cæsar passed the Thames at Coway stakes, notwithstanding the stakes: the town of Chertsey preserves a memorial of his name, as Cherburg in France: he pursued the Britons along the bank of the Thames as far as Sheperton, where the stakes were placed, and there pitched his camp with the back of it upon the Thames. At his camp on Greenfield common, near Staines, a splendid embassy came to him from the Londoners; desiring his alliance and protection, and that he would restore their prince Mandubrace, who was then in his retinue. To his little camp, or _prætorium_, on this account he orders another to be drawn round it, for reception of these ambassadors, and their prince, together with forty hostages which he demanded, and corn for his army. Upon this, ambassadors came to him from the _Cenimani_, people of Cambridgeshire; the _Segontiaci_, Hampshire; _Ancalites_, Buckinghamshire; _Bibroci_, about Berkshire; and _Cassii_, of Hertfordshire; submitting themselves to him. For them he orders another appendix to his camp, to receive them. When business was done with them, he moves forward to attack Casvelhan, who was retreated into his fortified town at Watford. One of his camps thitherward, is to be seen very fair on Hounslow heath, in the way to Longford; which I showed to lord Hertford then president, and to lord Winchelsea vice-president, of the Antiquarian Society, in April, 1723; who measured it, and expressed the greatest pleasure at the sight. His next camp was at Kingsbury: it is now the church-yard, and still visible enough: its situation is high, and near the river Brent: the church stands in the middle of it. From hence he went, and forced Casvelhan’s military _oppidum_ at Watford, and Rickmansworth; a gravelly island of high ground, _sylvis paludibusque munitum_, as he expresses it; and by this he brought Casvelhan to submit. It is not my present purpose to speak largely on these particulars; but from hence he advanced towards London, effectually to settle his friend and ally Mandubrace, whose protection he had undertaken, in the kingdom of the _Trinobantes_; and reconcile him to his subjects, and to his uncle Casvelhan. Mandubrace was the son of Immanuence, commonly called Lud in the British story, which signifies the _brown_; who was killed by his ambitious brother Casvelhan, too near a neighbour to London; his residence being at Harrow on the hill, and Edgeware called _Suellaniacis_ from him: he likewise forced Mandubrace to fly to Cæsar in Gaul, to implore his aid: the great Roman was not averse to so favourable an opportunity of advancing his glory, by invading Britain, a new world. [Illustration: 58·2ᵈ. _Prospect of Cæsars Camp at Sheparton Oct: 28 1723_ A. _Way to Domsday bushes & Chertsey_ B. _Way to Littleton & Greenfield Common_ C. _Lords bridge_ DD. _Plain Works of the Outer Ditch_ EE. _of the Inner_ F. _a Canal dug this year_ G. _the Antient Course of Ashford Brook_ _Stukeley delin._ _Toms Sculp._]