stealth, or at will, as above.1 And for those same reasons common may be appurtenant  to a free tenement. As common is a general term which includes many species,2 [so  too does that] common which is called pasture, [common] of everything which may  be eaten or grazed upon, the word being taken broadly or narrowly. Broadly, as  where one has common of pasture in another's property, that is, in herbage, mast,  whether acorns or nuts, and everything included in the word mast, also in leaves and  foliage.3 Narrowly, if he has some of these, one or two. Common of pasture may [also]  be classified according to time: exercisable at all times or only at certain times, at  certain hours. Also according to place, exercisable everywhere and throughout, without  any exception, [Some places are excepted tacitly,4 sometimes expressly, as rightful  fenced-in portions [which] cannot be claimed as pasture, unless they are specially  granted, except after a certain time [of year], as wheatfields [and] meadows [where  there are] temporary pens, as for oxen,5 for cows and calves at their times, [and] for  wethers and ewes and lambs at their times. Nor may pasture be claimed in anyone's  curtilage, nor in his gardens, orchards, parks or the like, nor in anyone's demesnes  which may be enclosed and cultivated, unless so provided by an unambiguous  modus of the constitution]67or in certain and fixed places, or8 in a certain place.9 Also  [according to] the kinds of animals, as10 where it is for beasts of every kind, or a certain  kind,11 [for beasts] without number, or with a limitation and with a fixed number.  Note that the interest one has in another's property ought not to be called common,  whether he has it in return for money or by way of sale, when he has no tenement to  which the common may be appurtenant;12 it ought to be called herbage rather than  common,13 since it may be a quasi-personal interest whether he pays a fixed or a  variable sum for having it. To have the right of digging in another's property, gold,  for example, may also be called common,14 according as it falls within the general term,  as was said above, and hence the place may be called a gold mine, or silver, hence a  silver mine, and so as to other metals. Also the right to dig stone, chalk, sand,15 turf  and the like. One may have common [which is] not of herbage, as the right to cut  turf16 or heath or the like for reasonable estovers. And so to cut in another's wood  for reasonable estovers, for building, fencing and burning.17
How common of pasture is lost after it has once been acquired.
 Let us now see how one may lose seisin of common of pasture after it has once been  acquired. It is clear that it may be lost by assent: just as it is acquired by mutual  assent and agreement.