On the north side of the city the common land was called the Moor, and we have seen how a part of this "Moor" outside Cripplegate was granted to St. Martin le Grand, the rest remaining a common playground as described by FitzStephen. A mandate of Henry III. of 1268 in the Close Rolls, however, commands the mayor and commonality "not to disturb Walter de Merton in possession of a Moor on the north side of the wall of London which the King gave to St. Paul's in consequence of the late disturbances."[128] It was fen land; FitzStephen tells how the citizens skated here, and bone skates of pre-Conquest date have been found in Moorfields. It is possible that all the common land surrounding the city was called the Fen or Moor, as a boundary on the west side against the land of Westminster was said at an early time to be in London Fen (see p. 60).[129] The 12-1/2 acres of land, mentioned in Domesday under the name of Noman's-land, and as having been held by the Confessor, was probably some of the city land. In the fourteenth century Charterhouse was built on ground called Noman's-land--probably the same. A part of Portsoken where fairs used to be held in the time of Henry III. was called East Smithfield; at the north-west angle of the city was another Smoothfield where the cattle fairs were held. As says FitzStephen: "Outside one of the gates immediately in the suburb is a field smooth in fact as in name. Every Friday, unless it be a feast, noble horses are here shown for sale. In another part of the field are implements of husbandry, swine, cows, great oxen, and woolly sheep.[130] On the north side there are pastures and pleasant meadow land, through which flow streams turning the wheels of mills. The tilled lands of the city are not barren soil, but fat plains producing luxuriant crops. There are also sweet springs of water which ripple over bright stones; amongst which there are Holy Well [Hoxton], Clerkenwell, and St. Clement's; they are frequented by many when they go out for fresh air on summer evenings."