Charmaine also happens to be an organist. When, as I do, I improvised the harmony to the last verse of the last carol (O Come, All Ye Faithful), she commented on wanting a copy of that harmonization. Well, since it was improvised, no copy exists, clearly. Regardless, I approximated at closely as I could (without listening to the recording, which I now realize would have given be a better approximation) and instead of not posting anything before Christmas as I had planned, I'm posting this before Christmas.
As with everything else, a PDF is available on request!
Final verse for Adeste Fideles, with choral unison:

Adeste Fideles (Final Verse) by Mike Cutler is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
"Adeste Fideles" attributed to John Francis Wade, c. 1743