at any two Notes that strike next
together may make a Change, which may be done either _single_ or
_double_, as you list. The _single_, by changing Two Notes; and the
_Double_, by changing Four, _i. e._ Two to make one Change, and two
another; which is however called _One double Change_, and not two
Changes; because tis made in striking the Notes of the _Bells_ once
round. For the rest, common Observation and Practice bids me stop here,
and demands a Clearing those dark Intricacies which attend
_Cross-Peals_.

_Of Cross-Peals._

_Art_, being a curious Searcher and Enquirer into the hidden and
abstruse _Arcana_'s of Difficulties, having found out that dark and
remote Corner of Obscurity, wherein the nature of these _Cross-Peals_
lay at first invelopped, has exhibited by its _Proselytes_ the ensuing
Demonstrations of that which before lay mantled up in Doubt: And to
effect this, these _Favourites of Art_ have, like ingenious Architects,
made Order and Method the _Basis_, on which the whole Structure depends:
For in these _Cross-Peals_ we must observe the _prime Movement_, which
sets the whole Frame a going, and that is called the _Hunt_, which hath
_One constant Uniform Motion throughout the Peal_, and different from
that of the other Notes; and indeed by this the whole Course of the Peal
is Steered. This keeps a continual motion through the other Notes,
_i. e._ From Leading, to strike behind, and from thence again to Lead;
which is called one _compleat Course_.

Some Peals upon _five Bells_ consist of _single_ Courses, wherein are
ten Changes, and twelve Courses make the Peal. Others upon Five, consist
of Double Courses, wherein are twenty Changes to every Course, and six
Courses in the Peal.

Upon _six Bells_ there are likewise _single_ and _double_ Courses,
_viz._ Twelve Changes in every single Course, as in _Grandsire Bob_, &c.
and Twenty-four Changes in every Double Course, as in _Colledge Bobs_,
that being the first Change of every Course, wherein the _Hunt_ leaves
Leading: In short, judiciously observe the first Course of any
_Cross-Peal_, and you will soon see the general Method of the whole
Peal: All Courses in Cross-Peals agreeing in these following three
Respects. First, _In the motion of the Hunt_. Secondly, _In the motion
of the rest of the Notes_: And Thirdly, _In making the Changes_. Which
three things being well (to omit Instances of Demonstration) and
narrowly observed, will be very helpful both in