I remarked that the city was just a thousand Roman feet in breadth, and that the breadth to the length was as three to five, of the same proportion as they make their bricks: it is posited obliquely to the cardinal points, its length from north-west to south-east; whereby wholesomeness is so well provided for, according to the direction of Vitruvius. The river Cam runs under the wall, whence its name; for I have no scruple to think this was the _Camboritum_ of Antoninus, meaning the ford over this river, or the crooked ford: in Lincolnshire we called a crooked stick, the butchers use, a _cambril_.[56] They have found many Roman coins in the city or Borough field, as they call it: I saw divers of them. In this parish, they say, has been a royal manor: not far off, by Audlenhouse, upon an eminence is a great Roman camp called Ringhill; a hunting tower of brick now stands upon it. Beyond this the Icening-street goes toward Icleworth in Suffolk, parting the counties of Cambridge and Essex all the way; and almost parallel to it runs a great ditch, viz. from Royston to Balsham, called Brentditch, where it turns and goes to the river below Cambridge, there called Flightditch. I imagine these to be ancient boundaries of the Britons, and before the Roman road was made, which naturally enough would have served for a distinction by the Saxons, as at other places, had their limits lain hereabouts. Two miles both ways of Royston is chalky soil:[57] about Puckeridge it is gravelly. On Bartlow hills there is a camp too, castle camps, and Roman antiquities found: I am told of three remarkable barrows thereabouts, where bones have been dug out. At Hadstok they talk of the skin of a Danish king nailed upon the church-doors. [Illustration: 59 +Camboritvm.+ _21. Aug. 1722._ _Thomæ Bawtre Conterraneo Suo Tabula votiva._ _Stukeley delin._] [Illustration: 45 _The_ Hunting Tower _in the Ro. Camp near_ Littlebury _Aug. 21. 1722._ _View of_ Silchester Walls _from the N.E. corner Aug. 5. 1722. Ro. Brick & Flint._ _Stukeley delin:_ & Amico Peregrino Bertie Ar. vovet. _E. Kirkall sculp:_] Now we shall take along with us the Itinerary of Antoninus in his fifth journey; for after he has gone from London toward Colchester, and part of Suffolk, he turns into this Icening-street at _Icianis_, which seems to be Icesworth beyond St. Edmundsbury; from whence to this _Camboritum_ is thirty-five miles: from thence to Huntingdon is just twenty-five, as they are noted; but it is to be supposed that the Itinerary went along the Icening-street to Royston, then took the Hermen-street; for so the miles exactly quadrate. [Sidenote: +Royston.+ Ro. _town_.]