Norman Walsh <ndw@nwalsh.com> writes:
> Right. I'll just have to dig in and see what I can do. Or dig into a
> lot of code ;-)

I dug about for a long while and made some progress. But getting “nnml:” into
the .newsrc.eld file in the right places was tedious and I got frustrated by
the number of mistakes I made.

When I had it mostly working, I discovered that I didn't need to specify

  (nnir-search-engine notmuch)

in the select method if I specified it as a default:

  (setq nnir-method-default-engines '((nnimap . imap) (nntp . gmane) (nnml . notmuch)))

So, in fact, I've gone back to mostly where I started with the
additional default and everything seems to be working fine.

                                        Be seeing you,
                                          norm

-- 
Norman Walsh <ndw@nwalsh.com> | There has never been an unexpectedly
http://nwalsh.com/            | short debugging period in the history
                              | of computers.--Steven Levy