They may also, if they agree, raise the said wall as high as they please, at their joint expense; and if it shall happen that one shall wish to raise the wall, and the other not, it shall be lawful for him who is willing, to raise his own part as much as he please, and build upon it, without damage of the other, at his own cost. And if any one shall build his own stone wall, upon his own land, of the height of sixteen feet, his neighbour ought to make a gutter under the eaves of the house which is placed on that wall, and receive in it the water falling from that house, and lead it on to his own land, unless he can lead it into the high street. Also, no one of two parties having a common wall built between them, can, or ought, to pull down any portion of his part of the said wall, or lessen its thickness, or make arches in it, without the assent and will of the other. And if any one shall have windows looking towards the land of a neighbour, and although he and his predecessors have long been possessed of the view of the aforesaid windows, nevertheless his neighbour may lawfully obstruct the view of those windows, by building opposite to them on his own ground, as he shall consider most expedient; except he who hath the windows can shew any writing whereby his neighbour may not obstruct the view of those windows. Let it be borne in mind that in former times a great part of the city was built of wood, and the houses were roofed with straw, reeds and such things; so that when any house caught fire, a great part of the city was destroyed by that fire; as happened in the first year of the reign of King Stephen. For it is written in the chronicles that in a fire which began at London Bridge, St. Paul's Church was burnt down, and the fire proceeded thence, burning all the houses and buildings as far as St. Clement Danes. Therefore many citizens, to avoid such danger, built according to their means, on their ground, a stone house covered and protected by thick tiles against the fury of fire, whereby it often happened that when a fire arose in the city and burnt many edifices, and had reached such a house, not being able to injure it, it became there extinguished, so that many neighbours' houses were wholly saved from fire by that house. (_b_) A decree made by the counsel of the citizens, for the setting into order of the city and to provide, by God's help, against fire. First, they advise that all ale-houses be forbidden, except those which shall be licensed by the common council of the city at Guildhall, excepting those belonging to persons willing to build of stone, that the city may be secure. And that no baker bake, or ale-wife brew, by night, either with reeds or straw or stubble, but with wood only.