I should also add that it's misleading to say that RVW called Star of the County Down 'Kingsfold'; although the former song is set to a variant of the same tune, the words are 20th century (Cathal McGarvey) and hadn't yet been written when the Hymnal was first published.

See previous discussions, including  Tune Kingsfold, where I mentioned that the tune was another one that RVW got at a pub; in this case The Wheatsheaf at Kingsfold.