On the other hand, when it became a recognized principle that everybody must have a lord, and that all folkland belonged to the king, it followed as a natural inference that all towns which had no other lord were counted as royal demesnes, and their chief magistrate was an officer of the crown. In the great cities he usually bore the title of _port-reeve_, a word whose first syllable, though here used to represent the town in general, refers in strict etymology to the _porta_, or place where the market was held, and thus at once points to the element in the life of the towns which gave them their chief consequence and their most distinctive character. The Norman conquest had led to a great increase of their trading importance; a sense of corporate life and unity grew up within them; their political position became more clearly defined; they began to recognize themselves, and to win their recognition at the hands of the ruling powers, as a separate element in the state. The distinction was definitely marked by the severance of their financial interests from those of the shires in which they stood; a fixed “aid,” varying according to their size and wealth, was substituted in their case for the theoretically even, but practically very unfair pressure of the Danegeld; and to avoid all risk of extortion on the part of the sheriff, their contribution to the ferm of the shire was settled at a fixed round sum deducted from the total and accounted for as a separate item, under the name of _firma burgi_, either by the sheriff or, in some cases where the privilege had been specially conferred, by the towns themselves. At the same time the voluntary institution of the gilds, which had long acted as a supplement to the loose territorial and legal constitution of the boroughs, forced its way into greater prominence; the merchant-gilds made their appearance no longer as mere private associations, but as legally organized bodies endowed with authority over all matters connected with trade in the great mercantile cities; the recognition of their legal status--generally expressed by the confirmation of the right to possess a “gild-hall” (or, as it was called in the north, a “hans-house”)--became a main point in the struggles of the towns for privileges and charters. The handicraftsmen, fired with the same spirit of association, banded themselves together in like manner; the weavers of London, Huntingdon and Lincoln, the leather-sellers and weavers of Oxford, bought of the crown in 1130 a formal confirmation of the customs of their respective gilds.[55] The lesser towns followed, as well as they could, the example of the great cities; they too won from their lords a formal assurance of their privileges; Archbishop Thurstan’s charter to Beverley was expressly modelled on that granted by King Henry to York.[56] [55] Pipe Roll, 31 Hen. I. (Hunter), Oxford, pp. 2 and 5; Huntingdon, p. 48; Lincoln, pp. 109, 114; London, p. 144.