Note 403 — Chapter XIII · MYTH IN THE HOMERIC POEMS.
Reading edition
Some resemblance to the case of Peleus and Thetis is shown by a story in Hrólfs S. Kraka, cap. 15, where an elf-woman bears a daughter to Helgi, the father of Hrólfr Kraki. Such incidents are not uncommon in folk-tales. We may note especially those cases in which the supernatural bride is a mermaid, perhaps representing the Swan-maiden of earlier times. Thetis has a good deal in common with the latter class of beings.