The following account of a boy who claimed to be able to visit the fairy realm and who is an historical character who lived into old age, and people still remembered him as an old man in 1859.
His name was Johnny Williamson and he would visit the fairies. On one occasion, having done so, he emerged from a hole in a peat bank. He said the fairies were "his folks". He was known as the Boy of Borgue.
Source: L. Henderson and E.J. Cowan Scottish Fairy Belief East Linton: Tuckwell Press, 2002, pp. 58-59.