Lisa,

There is a story documented in the Bodleian Library about one Anne Jeffries from a small village Called St Teath near Bodmin in Cornwall. Not really read the new bod's guide to how to do it all on Mudcat, so can't do blue clicky thing but try http://www.gandolf.com/cornwall
I found some things about her there. I wrote a song about her which may be of interest to you:

In the village of St Teath eight miles North of Bodmin
An apprentice named Anne Jefferies joined the home of Moses Pitt
She was bold she was brave she worked harder than the young men
Till at the age of nineteen years when poor Annie lost her wits

CHORUS: In a stranger's home, the poor girl's piskie laden
She's dancing in the arbour with the small men clad in green
Nearly lost her mind, the poor girl's piskie laden
And though a prisoner in the jail, she lived there like a queen.

Mrs Pitt, one day, well she ran out of flour
Halfway through the baking of a dozen loaves of bread
On her way back from the mill, she tripped and hurt her ankle
Was it by an accident or was it piskie led?

When Anne heard the tale of Pitt's mother's damaged ankle
She named for her the place where the incident occurred
And before the surgeon came to tend the weeping wounded
Anne mended her and healed the wound and all the pain she cured

Anne then told the tale of when sitting in the arbour
Six merry little fellows clad in green all did appear
Always came in twos and never sought to harm her
And taught her how to cure the sick buy whispering in her ear.

With fine fairy food they fed her and sustained her
From Harvest through to Christmas by the fairies she was fed
Her power of sight was amazing, 'twas second to no other
She could tell you where you'd been, with whom - and exactly what was said

When the preacher heard the tale of Annie Jefferies
Said that she worked for the devil, and to Bodmin should be sent
To reside in the jail with the criminals and low life
And the faeries said 'now don't resist' and along with her they went

When her trial it came, the Pitt family stood as witness
To the power of this maiden and her Piskie Laden ways
But no sentence was passed, and she went to live in Padstow
Where she married William Warren and with him saw out her days

Hope that is of use to you, sorry, don't know how to give you the tune! PM me if you would like it! When we go to the Isle of man, there is a place there called the Fairy Bridge. It is essential that you say hello to the fairies when you pass over it or you will have no luck!
Regards,
Lucy