[r-t] History

Mark Davies mark at snowtiger.net
Sat Jun 7 12:31:47 UTC 2014

JEC writes,

> Mathematical "purity" (and of course I was being facetious in using
> "pure" in other senses) does not seem to me to be a good reason for
> having a different rule for 7 or fewer

It is a good reason, because peal composition on seven bells is 
constrained by the length of the extent.


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