Anglo-Saxon Institutions. 449-1066 29 tion. Governmentally and economically they were little alien units springing up in the rural hundreds and shires. They must be taken into account in connection with Anglo-Saxon local government; and they become ever more important in governmental history. One is at once faced by the question of origins. What was the thing which made a place urban and the lack of which left it a village or township? At first, he is inclined to think of population as being the essential thing: when a community reaches a certain size, it should be declared a borough and receive the organisation and rights of one. But such a conscious process could only take place after a consider- able number of boroughs existed and people knew what was meant by one. What was the origin of the first boroughs? During the Roman period, there were cities in Britain, as elsewhere in the Roman empire; and these cities suffered the same devastations from the incoming barbarians as the other cities of the empire north of the Alps. Much that was material survived and, in several places, there was undoubtedly a continuous population; but it is im- probable that the government of these cities lasted through the century and a half of Anglo-Saxon invasion and con- quest. English municipal institutions had their origin in the Anglo-Saxon period. When the first English boroughs emerge from the dark- ness of the past, the things that distinguish them from the ordinary townships are few. But it is clear that a differentiation had begun: certain communities had started to travel a different road from that of the ma- jority; and, though the divergence was at first small, we know that many of these humble boroughs at length be- came true municipalities, and, on the way, set the example to other communities that sought to adopt their forms and attain their privileges. But the trouble is to account for the first distinguishing traits of the borough. Prob- ably these did not spring from the same causes in all cases, and, at present, it is not possible to distinguish