For water, most communities depended on rivers that ran near by or on public wells that were dug to reach the water underground. Some towns had water public water supply systems. Fresh water was brought into the town from a spring or pond above the town by wood or lead pipes or open conduits. Sometimes tree trunks were hollowed out and tapered at the ends to fit into the funnel-shaped end of another. But they leaked a lot. In London, a conduit piped water underground to a lead tank, from which it was delivered to the public by means of pipes and brass taps in the stone framework. This was London's chief water supply. Water carriers carried water in wooden devices on their backs to houses. The paving and proper drainage of the streets became a town concern. Building contracts began specifying the provision of adequate cesspits for the privies at town houses, whether the latrines were built into the house or as an outhouse. Also, in the better houses, there grew a practice of carting human and animal fecal matter at night to dung heaps outside the city walls. There was one public latrine in each ward and about twelve dung carts for the whole city. Country manor houses had latrines on the ground floor and/or the basement level. Stairwells between floors had narrow and winding steps. In London, the Goldsmiths, Merchant Taylors [Tailors], Skinners, and Girdlers bought royal charters, which recognized their power of self-government as a company and their power to enforce their standards, perhaps throughout the country. The Goldsmiths, the Mercers, and the Saddlers became the first guilds to receive, in 1394-5, charters of incorporation, which gave them perpetual existence. As such they could hold land in "mortmain" [dead hand], thus depriving the king of rights that came to him on the death of a tenant-in-chief. They were authorized to bestow livery on their members and were called Livery Companies. The liverymen [freemen] of the trading companies elected London's representatives to Parliament. In all towns, the organization of craft associations spread rapidly downwards through the trades and sought self-government. Craft guilds were gaining much power relative to the old merchant guilds in governing the towns. The greater crafts such as the fishmongers, skinners, and the corders (made rope, canvas, and pitch) organized and ultimately were recognized by town authorities as self-governing craft guilds. The building trade guilds such as the tilers, carpenters, masons, and joiners, became important. Masons were still itinerant, going to sites of churches, public buildings, or commanded by the king to work on castles. The guild was not necessarily associated with a specific product. For instance, a saddle and bridle were the result of work of four crafts: joiner (woodworker), painter, saddler (leather), and lorimer (metal trappings).