Some smiths traveled for their work, for instance, stonewrights building arches and windows in churches, and lead workers putting lead roofs on churches. An example of a grant of hides of land is: "[God has endowed King Edred with England], wherefore he enriches and honors men, both ecclesiastic and lay, who can justly deserve it. The truth of this can be acknowledged by the thegn AElfsige Hunlafing through his acquisition of the estate of 5 hides at Alwalton for himself and his heirs, free from every burden except the repair of fortifications, the building of bridges and military service; a prudent landowner church dues, burial fees and tithes. [This land] is to be held for all time and granted along with the things both great and small belonging to it." A Bishop gave land to a faithful attendant for his life and two other lives as follows: "In 904 A.D., I, Bishop Werfrith, with the permission and leave of my honorable community in Worcester, grant to Wulfsige, my reeve, for his loyal efficiency and humble obedience, one hide of land at Aston as Herred held it, that is, surrounded by a dyke, for three lives and then after three lives the estate shall be given back without any controversy to Worcester." At seaports on the coast, goods were loaded onto vessels owned by English merchants to be transported to other English seaports. London was a market town on the north side of the Thames River and the primary port and trading center for foreign merchants. Streets that probably date from this time include Milk, Bread, and Wood Streets, and Honey Lane. There were open air markets such as Billingsgate. There were wooden quays over much of the river front. Houses were made of wood, with one sunken floor, or a ground floor with a cellar beneath. Some had central stone hearths and earth latrines. There were crude pottery cooking pots, beakers and lamps, wool cloth, a little silk, simple leather shoes, pewter jewelry, looms, and quernstones (for grinding flour). Wool, skins, hides, wheat, meal, beer, lead, cheese, salt, and honey were exported. Wine (mostly for the church), fish, timber, pitch, pepper, garlic, spices, copper, gems, gold, silk, dyes, oil, brass, sulphur, glass, slaves, and elephant and walrus ivory were imported. Goods from the continent were sold at open stalls in certain streets. Furs and slaves were traded. There was a royal levy on exports by foreigners merchants. Southwark, across the Thames River from London,was reachable by a bridge. Southwark contained sleazy docks, prisons, gaming houses, and brothels.