[r-t] Lead head codes redux

[Graham John]

On 21 June 2017 at 11:43, Don Morrison <dfm at ringing.org> wrote:

> Does your count of 11 methods
> affected include any even stage, twin hunt methods (it may
> well be that the number of affected methods there is naught)?

One of the eleven is even stage.

> I have always presumed that a-m at odd stages refer to the
> change *following* the lead head, with the apices of the
> palindrome as the hunt bells swap with one another: 3rds
> for a-f and Nths for g-m; is this correct? ...

> I suppose another way of looking at this is "are a-m at odd
> stages and p-s at even stages only applicable to methods
> both of whose hunts bells are principle hunts?"

Yes. I believe that is correct.

Graham