I don't remember exactly where I got the idea that one of three fates was sure to befall a mortal who dared trespass (especially at night), upon a fairy mound. It seems to me to be as old as memory, itself. Sacred space is rife with taboo, as much to keep the unworthy out as to sanctify the worthy petitioner in the region of power. Thus, the first two fates are terrible and the third is reserved only for the righteous devotee. Death, madness and the gift of poetry (or prophecy) seem a right combination to me, and when I wrote the special additional material for my live, award winning world premiere benefit performance of Grumpuss, they were the "three fates" the Queen of the Sidh put to the bard who trod upon her Fairy Mound on All Hallow's Eve.

      Morgen stops at the top of the hill. He knows the sacred space within the stone circle below is sacred. Laura told him so on the way out to the cottage in the pony cart. Aware of the "fairy tale" risk involved in trespassing, he does not feel compelled to break the taboo. It will take more than a bit of folklore and a cluster of rocks to stir Morgen to folly.
Travis Edward Pike
28 January 2019, Otherworld Cottage