In many legends the act of healing or exorcisms involved muttering in some dead language, such as Ancient Egyptian, Gaelic or Latin. The ritual usually involved burning incense or Herbs; lighting candles; gathering plants for potions; making mysterious gestures and chanting under the light of the Moon. Here is an incantation to the Mistress of the Night, our Moon.
This Poem, or incantation has it's history in the old Diana worship.
(Diana was one of the Roman Moon Goddesses.)