In most large towns, there were groups of tailors and hatmakers, glovers, and other leatherworkers. Some towns had a specialization due to their proximity to the sources of raw materials, such as nails, cutlery, and effigies and altars. Despite the spread of wool manufacturing to the countryside, there was a marked increase of industry and prosperity in the towns. The principal streets of the larger towns were paved with gravel. Gild halls became important and imposing architecturally. London had some houses of stone and timber and some mansions of brick and timber clustered around palaces. In these, bedrooms increased in number, with rich bed hangings, linen sheets, and bolsters. Bedspreads and nightgowns were introduced. Fireplaces became usual in all the rooms. Tapestries covered the walls. Carpets were used in the private rooms. Some of the great halls had tiled floors. The old trestle tables were replaced by tables with legs. Benches and stools had backs to lean on. Women and men wore elaborate headdresses. There are guilds of ironmongers, salters, and haberdashers [hats and caps]. On the outer periphery are mud and straw taverns and brothels. The Tailors' and Linen Armorers' Guild received a charter in 1503 from the King as the "Merchant Tailors" to use all wares and merchandise, especially wool cloth, as well wholesale as retail, throughout the nation. Some schooling was now being made compulsory in certain trades; the goldsmiths' company made a rule that all apprentices had to be able to read and write. A yeoman was the second-rank person of some importance, below a knight, below a gentleman, below a full member of a guild. In London, it meant the journeyman or second adult in a small workshop. These yeomen had their own fraternities and were often on strike. Some yeomen in the large London industries, e.g. goldsmiths, tailors, clothworkers, who had served an apprenticeship started their own businesses in London suburbs outside the jurisdiction of their craft to search them. The Merchant Adventurers created a London fellowship confederacy to make membership of their society and compliance with its regulations binding on all cloth traders. Membership could be bought for a large fee or gained by apprenticeship or by being the son of a member. Foreign trade was revived because it was a period of comparative peace. The nation sought to sell as much as possible to foreign nations and to buy at little as possible and thereby increase its wealth in gold and silver, which could be used for currency.