The Sunday School children, so the story goes, were invited to take part in the Christmas Eve service.
The minister introduced them to the congregation and said "And the next song we shall sing is a new hymn entitled 'Christmas Love'."
That was the cue for the children each to raise a card with a letter printed on it, spelling out the name of the song.
But one little girl had her card upside down, and when the children raised the cards, this is what the congregation read:
C H R I S T W A S L O V E