George Borrow

“ The Welsh have much to say of the Tylwyth Teg, or fair family, and many believe in them.'
'And do you believe in them?' said I.
'I scarcely know what to say. Wise and good men have been of opinion that they are nothing but devils, who, under the form of pretty and amiable spirits, would fain allure poor human beings ”

“ I see nothing irrational in the supposition.'
'Do you believe in devils, then?'
'Do I believe in devils, young man?' said Peter, and his frame was shaken as if by convulsions. 'If I do not believe in devils, why am I here at the present moment?'
'You know best,' said I; 'but I don't believe that fairies are devils, and I don't wish to hear them insulted. What learned men have said they are devils?'
'Many have said it, young man, and amongst others, Master Ellis Wyn, in that wonderful book of his, the Bardd Cwsg.'
'The Bardd Cwsg,' said I ”