"The numbers of people slaughtered vary from 7,000 to 25,000. These figures are greatly exaggerated. Berwick had been the most important town in Scotland, with more money entering the Scots exchequer than that from all the other Scottish towns combined, but that was from exports. It has been estimated that the other important towns at the time - Edinburgh, Aberdeen and Perth would have had populations of only 2,000. It may be that Berwick had a higher population, perhaps 5,000, but then, it is unlikely everyone was killed.
Edward stayed in Berwick for a month. He ordered a stone wall to be built encircling the town with a ditch 80’ wide and 40’ deep on the north and east sides of the town. This was to have an embankment surmounted by a quickly erected wooden palisade which would be replaced in time by a stone wall encircling the town. However, it was many years before this was completed, ironically, by Robert Bruce."