were other city rules on building, public order, the use of fountains, precautions against fire, trading rights in various districts, closing time of taverns, and when refuse could be thrown into the streets, e.g. nighttime. Aldermen were constantly making rounds to test measures and weights, wine cups, the height of tavern signs, and the mesh of the fishing nets, which had to be at least two inches wide. They saw that the taverns were shut when curfew was rung and arrested anyone on the street after curfew who had a weapon, for no one with a sword was allowed on the streets unless he was some great lord or other substantial person of good reputation. Wards provided citizens to guard the gates in their respective neighborhood and keep its key. The city was so dense that nuisance was a common action brought in court, for instance, vegetable vendors near a church obstructing passageway on the street or plumbers melting their solder with a lower than usual shaft of the furnace so smoke was inhaled by people nearby. Crime in London was rare. Murder, burglary, highway robbery, and gross theft were punishable by hanging. Forgery and fraud, were punishable by the placement in the pillory or stocks or by imprisonment. Perjury was punished by confession from a high stool for the first offense, and the pillory for the second. Slander and telling lies were punished by the pillory and wearing a whetstone around one's neck. There was an ordinance passed against prostitutes in 1351. London as well as other port towns had not only prostitutes, but syphilis. Prominent Londoners sought to elevate their social position by having their family marry into rural landholding families of position. For poor boys with talent, the main routes for advancement were the church, the law, and positions in great households. Many master freemasons, who carved freestone or finely grained sandstone and limestone artistically with mallet and chisel, left the country for better wages after their wages were fixed by statute. The curvilinear gothic style of architecture was replaced by the perpendicular style, which was simpler and cheaper to build. Church steeples now had clocks on them with dials and hands to supplement the church bell ringing on the hour. Alabaster was often used for sepulchral monuments instead of metal or stone. With it, closer portraiture could be achieved. In the 1300s and 1400s the London population suffered from tuberculosis, typhus, influenza, leprosy, dysentery, smallpox, diphtheria, measles, heart disease, fevers, coughs, cramps, catarrhs and cataracts, scabs, boils, tumors, and "burning agues". There were also many deaths by fires, burning by candles near straw beds when drunk, falling downstairs when drunk, and drowning in the river or wells. Children were often crushed by carts, trampled by horses, or mauled by pigs.