The Conqueror's Latin charter is given in Dugdale, and in the passage used by Stow the stream is spoken of as _rivulus foncium_. Mr. Stevenson, in publishing a Saxon version of the same charter 1068 A.D.,[39] shows that _rivulus foncium_ was a translation of the O.E. _Wylrithe_, meaning a small stream (_rithe_) issuing from a spring (_wyl_). This "Well-brook"[40] must surely have been intended, not for the western stream at all, but for the upper part of the "broke" running into the "burh" directly afterwards mentioned in the charter, the present Walbrook. Outside the walls the stream possibly ran in a west-to-east direction, and so formed the north boundary of the property against the moor. Mr. Stevenson appears not to have been of this view himself, as he speaks of the Walbrook as "probably nameless" when the charter was written; but he points out that it was called Walebroc in a charter of Wulfnoth (1114-33)--"probably the Wulfnoth whose name is recorded in St. Mary Woolnoth." This is a Ramsey charter (in Rolls series), and the terms are most precise by which Wulfnoth of Walebroc, London, sold a piece of land in Walebroc, "whence he was called Wulfnoth of Walebroc," with a house of stone and a shop, for ten pounds of pence.[41] St. John "super Walebroc" is mentioned about the same time in the St. Paul's documents, and that Walbrook was then a proper name of some antiquity seems to be conclusively proved by Geoffrey of Monmouth's legend that it was called after Gallus by the Britons, "and in the Saxon Gallembourne." Altogether it can hardly be doubted that the Wyl- of the charter represents the modern Wal- in Walbrook.[42] Within the walls the Walbrook ran right through the midst of the city from north to south, and divided the eastern wards from the western. It remained an open stream well into the Middle Ages; in 1286 an order was given to cleanse it "from the Moor of London to the Thames." Its course is well defined by three churches, St. John's, St. Stephen's (formerly on a different site to the west, Stow), and St. Mildred's, all "super Walbrook." St. Margaret Lothbury also stood above it on vaults. Its relation to the present street is made clear in a document of 1291 regarding a tenement "between the course of the Walbrook towards the west, and Walbrook Street towards the east."[43] The arch under which it entered the city through the wall seems to have been discovered. Roach Smith describes this opening thus: "Opposite Finsbury Circus, at a depth of 19 feet, a well-turned Roman arch was discovered, at the entrance of which on the Finsbury side were iron bars placed apparently to restrain the sedge and weeds from choking the passage."[44]