The piskies had a reputation of confusing the unwary traveler, even to the point of having to ask for help in getting out of a perfectly known field, as this story related to A K Hamilton Jenkin describes:

Not long since, middle–aged man, who is well known to the writer, described how his wife had on one occasion been 'piskey–mazed' whilst going home through a field in the parish of 'Costenton' (Constantine). Normally, she knew the field perfectly well; but on this occasion she wandered round and round so long that, at length, she had actually had to call for assistance in order to be shown the way out.

See 'Pisky Led' for a similar story.