The treble hath a direct hunting course as in plain changes, and every other bell hath also a like hunting course with that of the treble except when the _bobs_ hinder. The _bobs_ are double changes, and made on the two first and two last bells according to this rule, _viz._ every time the _treble_ goes to lead and leaves leading, a _bob_-change is then made, except the _5th_ lying next it makes a change there with it, and then not. Now ’tis observable, that once in twenty changes, that is, at every second leading of the treble, the _5th_ lies next it, and consequently there is but one _bob_-change then to be made, but at other times two; so that at one leading of the treble there is but one _bob_-change made, at the next leading there are two, and so successively by turns, which for distinction may be call’d _single_ and _double bobs_, The two bells that dodg behind at a _bob_ continue there dodging until the treble comes up and displaceth them, and at every _bob-change_ the bell in the _3d_ place lieth still, and then moves down to lead. By this method it will go sixty changes; and to carry on the course _extreams_ must be made, there being two in the peal. The manner of making an _extream_ I have at large shewed in the _Introduction_, and the _extreams_ may here be made in any place according to the general rule there set down. The easiest way in practice is to make them at the leadings of the treble; at any single _bob_ it maybe made behind, two of the _extream_ bells lying there, and to lie still whilst the bells in the _2d_ and _3d_ places do make the _single_ change: at any double _bob_ it may be made in the _2d_ and _3d_ places, so that the _single_ must there be made behind. If the first _extream_ is made at the single _bob_, the second must be made at the third following single _bob_; or if the first is made at a double _bob_, the second must be made at the third double _bob_ following, as in this peal here prickt, where the first _extream_ is made at a double _bob_, and the second also made at the third following double _bob_.