It was said to be no nuisance to a neighbourhood for a butcher or chandler (_Rankett’s_ case) to set up their trades among them; but it may be by such or other tradesmen (as a dyer, _Hutt._ 136) laying stinking heaps at their doors; in other cases the necessity of the thing shall dispense with the noisomeness of it.[549] _Jacobs’ Law Dict. tit._ Nuisance; 2 _Rolle’s Abr._ 139. But query, how the necessity is to be proved? for though the sale of meat and candles be necessary in a town, the one need not be slaughtered, nor the other manufactured among ordinary dwelling houses; the one is offensive to the feelings of humanity and disgusting to the senses, the other is so disagreeable to the olfactory nerves, that few persons can pass a tallow-chandlers on a melting-day without experiencing some degree of nausea. In all the best regulated cities of Europe the slaughter-houses are confined to particular situations, generally without the walls;[550] the general neatness and propriety of English towns leave little to be derived from foreign example, but in this instance we are defective. Some years since, a pamphlet was published against the nuisance of street butchers, but evidently without effect; perhaps the mere vending of meat in open shops may not be attended with any evil sufficient to counter-balance the convenience; but where the beasts are also slaughtered in ordinary situations, the nuisance is very considerable, and in many instances likely to be injurious to the health of the neighbourhood; for though the nuisance is not so apparent in some of the streets as before the act of the _57th Geo._ 3,[551] yet the accumulation of filth behind the houses is likely to be the greater from the very circumstance of its being remote from public observation. Though in making these observations we recommend general markets, and selected situations, for the exercise of particular trades, rather than that they should be dispersed throughout the town; yet we must observe, that unless these districts are made the subject of peculiar regulation, the public evil might be encreased in intensity by accumulation, much more than it had been diminished by segregation. In places for the sale of animal food cleanliness is very generally attended to, as a contrary practice would greatly increase the tendency to putrefaction; self-interest is here the best possible guard against nuisance, but this motive does not so immediately apply to other cases,[552] and we accordingly occasionally observe the utmost disregard of public convenience in the conduct of many disgusting manufactures.