by which [a disseisin and] several nuisances may accrue to a neighbour, as where by  a bank he obstructs the road by which [the other] used to enter his pasture; he commits  a disseisin of common and likewise a nuisance in connexion with the road, [and  if] it diverts water he thus effects one disseisin of common in his own land and two  nuisances, by the one act,1[let it be done as2 above.] One may, as a result of a single  act, be liable to several in disseisin and nuisance, as where one encloses another's  tenement or common,3 in which one person has a free tenement, a second (one or  several) common of pasture, a third a right of way and passage through the middle,  a fourth [a way] to a watering place in some part, and so ad infinitum. There will here  be several disseisins and several nuisances, hence recourse must first be had to a  remedy which determines them all, if the lord whose tenement it is wishes to bring  it, otherwise let each take action for himself and by himself. If one diverts a watercourse  we must see in what county and what vill and in what place the thing that  causes the damage has been made, that is, the weir, pond or fishery.4 Also whether  the water in which the harmful thing is erected is the property of the defendant, or  common, or partly his own, that is, up to the center of the stream, and partly another's.5  If it all belongs to him who diverts and is in the same vill, and the tenement  damaged is in the same vill, the writ then stands, since it says, why such a one has  diverted the course of the water in such a vill to the nuisance of the free tenement  of such a one in the same vill.6 If the water is the common property of several [and  in part] his own (I do not speak only of a right of fishing,)7 we must then see what.
If a market is established to the nuisance of a neighbouring market.
 Among other nuisances a liberty may be granted to the nuisance of a liberty previously  granted, as where the liberty of having a market in some fixed place is granted  to a person provided it is not to the nuisance of any neighbouring market. Hence  we first must see what sort of market ought to be called neighbouring and what not  neighbouring but8 remote. Also what sort of nuisance, [if] the thing causing the harm  admits of abatement, that is, whether it is harmful and wrongful, or only harmful and  not wrongful, because it is remote, or harmful and wrongful because it is neighbouring,  or, if neighbouring, not wrongful because not harmful but beneficial. A market  may be called neighbouring, and a wrongful nuisance, because it is harmful whenever9  it is held within six leagues and a half and the third part of a half [of the first]. The  reason, according to the sayings of the elders, is because every reasonable day's  journey consists of twenty miles. A day's journey is divided into three parts. The  first part, in the morning, is given to those going to the market; the second to buying  and selling, which ought to suffice for all except perhaps for those merchants who  have stalls, who lay out and expose their ware for sale,