The majority of extant memorial brasses are now found in England, where it is calculated that there may be about 4,000 still remaining in various churches. They are most abundant in the eastern counties, and this fact has been frequently adduced in support of the opinion that they were of Flemish manufacture. But at the time sepulchral brasses were most often fashioned, the eastern counties of England were a centre of commercial activity and wealth, and there are numerous engraved memorials of civilians and prosperous merchants in the churches of Ipswich, Norwich, Lynn and Lincoln. Flemish brasses can be found in England, but they are not common, and they are readily distinguished from English workmanship. The Flemish examples have the figures engraved in the centre of a large plate, the background filled in with diapered or scroll work, and the inscription placed round the edge of the plate. The English examples have the figures cut out to the outline and inserted in corresponding cavities in the slab, the darker colour of the stone serving as a background. This is not an invariable distinction, however, as figure-brasses of Flemish origin are found both at Bruges and in England. But the character of the engraving is constant, the Flemish work being more florid in design, the lines shallower, and the broad lines cut with a chisel-pointed tool instead of the lozenge-shaped burin. The brass of Robert Hallum, bishop of Salisbury, the envoy of King Henry V to the council of Constance, who died and was interred there in 1416, precisely resembles the brasses of England in the details which distinguish them from styles elsewhere in Europe.