The popular tradition, (attested by an inscription on the fountain in the Market Place,) which gives this hero the whole credit of the street runlets, seems, however, to go too far, though they were certainly first made during his life-time. Their source is in some springs which issue from the chalk near Great Shelford, four miles south-east of Cambridge, and which are called, as such sources are commonly called hereabouts, "The Nine Wells"--nine being used as an indefinite number. It is interesting to remember that this conception evolved itself also amongst the ancient Greeks, who talked of the "Nine Fountains" at Athens, and the "Nine Ways" at Amphipolis, with exactly the same indefiniteness of numeration. The ancient outfall of these springs seems to have been by what is now called "Vicar's Brook," which is bridged by the London Road at the first milestone from Cambridge. Till the eighteenth century the bridge was a ford, known as Trumpington Ford. The earliest proposal to intercept the stream near this spot and divert its course through the town, was due, not to Hobson, but to another worthy (or unworthy) contemporary of his, Dr. Andrew Perne, then Master of Peterhouse College, a divine of such an accommodating breadth of view that he alone, amongst all the higher authorities of the University, succeeded in retaining his post and his emoluments throughout the horrible see-saw of the Reformation period. We first hear of him in the reign of Edward the Sixth, as a Protestant of such stalwart calibre that he destroyed as "idolatrous" almost every single book in the University Library. Under Mary he figures as no less ardent a Catholic, even to the degree of digging up and publicly burning (in default of living heretics) the corpses of the celebrated Protestant teachers Bucer and Fagius. Finally the accession of Elizabeth convinced him once more that Protestantism was the truest form of Christianity; and she lived long enough to keep him from again changing his principles. This amazing versatility naturally did not pass without comment. The wits of the University coined from his name the Latin verb _pernare_ "to be a turn-coat," and declared that the A.P. which showed on a new weather-cock given by him to his College stood for A Protestant or A Papist indifferently. It was this man who, in 1574, started the idea of bringing the Shelford water into Cambridge. The plan was carried out by "Undertakers" (who hoped to make money by it), in 1610, and amongst these Hobson would seem to have been the predominant partner. [Illustration: _Peterhouse._]