I haven't been following your messages, so I don't know whether you have given details for Archibald somewhere (it is easier to reply if you keep your messages together by responding on an old thread), and you may already have seen this, but in case not, Brian Lawson's burial index has:
SHIMMIN, Archibald 74 Dbc 1 Mar 1924.

If this is your one you could order his death cert from the Registry.

Sue