linguistic:paraphrasing, structural:scholar_edition
Legends

Sometimes fairies are described as assuming the guise of an animal. In Scotland, it was peculiar to the fairy women to assume the shape of deer; while witches became mice, hares, cats, gulls, or black sheep. In "The Legend of Knockshigowna ", in order to frighten a farmer who pastured his herd on fairy ground, a fairy queen took on the appearance of a great horse, with the wings of an eagle, and a tail like a dragon, hissing loud and spitting fire. Then she would change into a little man lame of a leg, with a bull's head, and a lambent flame playing round it.

In the 19th-century Child ballad " Lady Isabel and the Elf-Knight ", the elf-knight is a Bluebeard figure, and Isabel must trick and kill him to preserve her life. The child ballad " Tam Lin " reveals that the title character, though living among the fairies and having fairy powers, was, in fact, an "earthly knight" and though his life was pleasant now, he feared that the fairies would pay him as their teind (tithe) to hell.

" Sir Orfeo " tells how Sir Orfeo's wife was kidnapped by the King of Faerie and only by trickery and an excellent harping ability was he able to win her back. "Sir Degare" narrates the tale of a woman overcome by her fairy lover, who in later versions of the story is unmasked as a mortal. " Thomas the Rhymer " shows Thomas escaping with less difficulty, but he spends seven years in Elfland. Oisín is harmed not by his stay in Faerie but by his return; when he dismounts, the three centuries that have passed catch up with him, reducing him to an aged man. King Herla (O.E. "Herla cyning"), originally a guise of Woden but later Christianised as a king in a tale by Walter Map, was said, by Map, to have visited a dwarf 's underground mansion and returned three centuries later; although only some of his men crumbled to dust on dismounting, Herla and his men who did not dismount were trapped on horseback, this being one account of the origin of the Wild Hunt of European folklore.

A common feature of the fairies is the use of magic to disguise their appearance. Fairy gold is notoriously unreliable, appearing as gold when paid but soon thereafter revealing itself to be leaves, gorse blossoms, gingerbread cakes, or a variety of other comparatively worthless things.

These illusions are also implicit in the tales of fairy ointment. Many tales from Northern Europe tell of a mortal woman summoned to attend a fairy birth — sometimes attending a mortal, kidnapped woman's childbed. Invariably, the woman is given something for the child's eyes, usually an ointment; through mischance, or sometimes curiosity, she uses it on one or both of her own eyes. At that point, she sees where she is; one midwife realizes that she was not attending a great lady in a fine house but her own runaway maid-servant in a wretched cave. She escapes without making her ability known but sooner or later betrays that she can see the fairies. She is invariably blinded in that eye or in both if she used the ointment on both.

There have been claims by people in the past, like William Blake, to have seen fairy funerals. Allan Cunningham in his Lives of Eminent British Painters records that William Blake claimed to have seen a fairy funeral:

'Did you ever see a fairy's funeral, madam?' said Blake to a lady who happened to sit next to him. 'Never, sir!' said the lady. 'I have,' said Blake, 'but not before last night.' And he went on to tell how, in his garden, he had seen 'a procession of creatures of the size and colour of green and grey grasshoppers, bearing a body laid out on a rose-leaf, which they buried with songs, and then disappeared.' They are believed to be an omen of death.