"At this time the fountain of learning in Cambridge was but little, and that very troubled.... Mars then frighted away the Muses, when the Mount of Parnassus was turned into a fort, and Helicon derived into a trench. And at this present, King William the Conqueror, going to subdue the monks of Ely that resisted him, made Cambridgeshire the seat of war."--FULLER. William I. at Cambridge Castle--Cambridge at the Domesday Survey--Roger Picot the Sheriff--Pythagoras School--Castle and Borough--S. Benet's Church and its Parish--The King's Ditch--The Great and the Small Bridges--The King's and the Bishop's Mills--The River Hithes--S. Peter by the Castle and S. Giles Church--The early Streets of the City--The Augustinian Priory of Barnwell--The Round Church of the Holy Sepulchre--The Cambridge Jewry--Debt of early Scholars to the Philosophers of the Synagogue--Benjamin's House--Municipal Freedom of the Borough. On the site of the ancient Roman station of which we have spoken in the preceding chapter, as guarding the river ford and the pass between forest and fen into East Anglia, William the Conqueror, returning from the conquest of York in the year 1068, founded Cambridge Castle, that "it might be"--to quote Fuller's words--"a check-bit to curb this country, which otherwise was so hard-mouthed to be ruled." Here, in the following year, he took up his abode, making the castle the centre of his operations against the rebel English who had rallied to the leadership of Hereward the Wake, in his camp of refuge at Ely. But the castle at Cambridge never became a military centre of importance. No important deed of arms is recorded in connection with it. It was a mere outpost, useful only as a base of operations. It was so used by William the Conqueror. It was so used by Henry III. in his futile contest with the English baronage. It was so used by the Duke of Northumberland in his unsuccessful attempt to crush the loyalist rising of East Anglia against his plot to place Lady Jane Grey on the throne. It was so used by Oliver Cromwell when he was organising the Eastern Counties Association, and forming "his lovely company" of Ironsides. But beyond these episodes Cambridge Castle has no history. In the early part of the fourteenth century it was used as a prison for common criminals. Edward III. built his College of King's Hall with some of its materials, and from that time onwards it appears to have been used as a quarry by the royal founders of more than one college. Its last remaining outwork, the Gate House, was demolished in 1842. Now there is nothing left but the grass-grown mound, still known as Castle Hill, the resort of occasional American tourists who are wise enough to know how fine a view of the town may be obtained from that position, and, so it is said, a less frequent place of pilgrimage also to certain university freshmen who are