Both corrigans and lutins are supposed to guard hidden treasure; some trouble horses at night; some, like their English cousins, may help in the house-work after all the family are asleep; some cause nightmare; some carry a torch like a Welsh death-candle; some trouble men and women like obsessing spirits; and nearly all of them are mischievous.
"The Fairy-Faith in Celtic Countries"
W. Y. Evans Wentz
"It is this: whatever you may see-little tricks of speech or movement-you must not for one instant yield to the thought that the creature that is obsessing him is what he thinks it is.
"The Necromancers"
Robert Hugh Benson
Your object is to fight on his side, remember, against this thing that is obsessing him.
"The Necromancers"
Robert Hugh Benson