But although the economy of mechanical power was not yet operative to any appreciable extent in concentrating labour, certain other notable economics of large-scale production were beginning to assert themselves in all the leading manufactures. Indeed so powerful are some of the economies of division of labour and co-operation even in a primitive condition of the industrial arts, that Professor Ashley considers it not improbable that the great manufactory might have become an important or even a dominant feature of the woollen trade as early as the sixteenth century, if legislative enactments had not stood in the way.[49] As it was, these earlier centralising forces, while they drove the workers to work and live in closer and compacter masses, did not at first dispose them in factories to any great extent. They continued for the most part to work in their own houses, though for material and sometimes for the implements of their craft they were dependent upon some merchant or large master-manufacturer. This was the condition of industry in the neighbourhood of Leeds in 1725. "The houses are not scattered and dispersed as in the vicarage of Halifax, one by one, but in villages, and those houses thronged with people and the whole country infinitely populous."[50] In the more highly-developed branches of the cloth trade, however, where the best looms were a relatively costly form of capital, the foundation of the factory system was clearly laid. In Norwich, Frome, Taunton, Devizes, Stourbridge, and other clothing centres, Defoe found the weaving industry highly concentrated, and rich employers owning considerable numbers of looms. Some of this work was put out by the master-manufacturers, but other work was done in large sheds or other premises owned by the master. This large organised "business," half factory, half domestic, continued to prevail in the important West of England clothing industry up to the close of the eighteenth century. "The master clothier of the West of England buys his wool from the importer, if it be foreign, or in the fleece if it be of domestic growth; after which, in all the different processes through which it passes, he is under the necessity of employing as many distinct classes of persons; sometimes working in their own houses, sometimes in that of the master clothier, but none of them going out of their proper line. Each class of workman, however, acquires great skill in performing its particular operation, and hence may have arisen the acknowledged excellence, and, till of late, the superiority of the cloths of the West of England."[51]