CAMBRIDGE, now a town abounding in and surrounded by noble trees, was originally a British settlement, placed on that bold spur of high ground, rising from the surrounding treeless mires, on which in after years the Romans established their military post of Camboricum, and where in later ages William the Conqueror built his castle. The great artificial mound, which, like some ancient sepulchral tumulus, is all that remains to tell of William's fortress and to mark where Roman and Briton had originally seized upon this strategic point, crowns this natural bluff, overlooking the river Cam. Standing on it, with the whole of Cambridge town and a wide panorama of low-lying surrounding country disclosed, it is evident that this must have been the place of places for many miles on either hand where, in those remote days, the river could be crossed. Everywhere else the wide-spreading swamps forbade a passage; and, consequently, those who held this position, and could keep it, could deny the whole country to the passage of a hostile force from either side. Whether one enemy sought to penetrate from London to Ely and Norfolk, or whether another would come out of Norfolk into South Cambridgeshire or Herts, he must first of necessity dispose of those who held the key of this situation. The Romans, before they could subdue the masters of this position, experienced, we may well believe, no little difficulty; and it is probable that the perplexity of antiquaries, confronted by the existence of a Roman camp or station here, and of another three miles higher up the Cam at Grantchester, may be smoothed out by the very reasonable explanation that Grantchester was the first Roman camp over against the British stronghold at Cambridge, and that, when the Romans had made themselves masters of Cambridge, that place remained their military post, while Grantchester became a civil and trading community and a place of residence. [Illustration: CAMBRIDGE CASTLE A HUNDRED YEARS AGO.] Both place-names derive from this one river, masquerading now as the Granta and again as the Cam, but by what name the Romans knew Grantchester we do not know and never shall. At Roman Camboricum those ancient roads, the Akeman Street and the Via Devana, crossed at right angles, meeting here on this very Castle hill: the Via Devana on its way from Colchester to the town of _Deva_, now Chester; the Akeman Street going from _Branodunum_, now Brancaster, on the coast of Norfolk, to _Aquæ Solis_, the Bath of our own day.