E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A mortal born and christened, but stolen by the king of the fairies and brought up in elf-land. He was sent to Lord Richard, the husband of Alice Brand, to lay on him the curse of the sleepless eye for killing his wifes brother Ethert. When Lord Richard saw the hideous dwarf he crossed himself, but the elf said, I fear not sign made with a bloody hand. Then forward stepped Alice and made the sign, and the dwarf said if any woman would sign his brow thrice with a cross he should recover his mortal form. Alice signed him thrice, and the elf became the fairest knight in all Scotland, in whom she recognised her brother Ethert. (Sir Walter Scott: Alice Brand; Lady of the Lake, iv. 12.)