always come together to make a change in one place, just at 120 changes distance from one another throughout each peal. Now as the second _extream_ must be made just 360 changes from the first, so the making of it may thus be guided: Look how many changes, or else how many leadings of the _whole-hunt_ the first _extream_ is made after the _half_ and _quarter-hunts_ have made a change together, so many changes or leadings of the _whole-hunt_ must the second _extream_ be made, after the third following time that those two bells do made a change in the same place again. And likewise in all peals, where there are single and double _bobs_, the same observations will also hold good, in making the _extreams_ either after the single or double _bobs_ as before; there being likewise 120 changes distance between the single _bobs_ and also between the double _bobs_: so that if the first _extream_ is made at a single _bob_, the second must then be made at the third following single _bob_, and the like also at double _bobs_. And such kind of observations, according to the nature of the peal, will guide the making of the second _extream_ in any peal, either upon five or six bells. Wherein ’tis observable, that the second _extream_ must always be made by the same two bells, and in the same place where the first was made, which two bells will in course lie apt for that purpose; and the rest of the bells will also in course lie in the same places at the second _extream_ where they lay at the first. After the making of the first _extream_, the method of the peal goeth on as if no _extream_ had been made; and also after the making of the second _extream_ if any remaineth, it also goes on, until in course the bells come round. In all compleat peals of _doubles_ upon six bells there may also moveable _extreams_ be made, which are made according to this rule; wheresoever any two of the _extream_ bells are together, and in course to lie still, those two bells by making a change will thereby make the _extream_, which is as effectual as the fixed _extream_, the reason and ground of both being one and the same. There are also two of these _extreams_ in the peal, and the second always made 360 changes from the first, and the making of it guided by such kind of observations as before. When moveable _extreams_ are made, then there will be two triple changes in the 720; but when fixed _extreams_ are made, then two _singles_.