Another story about the Spriggans from Trencrom Hill can also be found amid Hunt’s book:
sacred-texts.com/neu/eng/prwe/prwe045.htm
and hinges on the slightly weird idea that the pixies would be counting their riches at a human’s house. The old woman who owned the house stole their money and moved to St Ives. Well that was her excuse for her sudden improvement in wealth at least. However, you can’t mess with the pixies: her comeupance was that one touched her clothes, and she had awful pains.