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 Rh ancestresses). In some forms of the story, enumerated by Mr. Hartland, the captured wife returns to her original home, not when she recovers her robe of feathers but when the husband breaks some tabu (strikes her, chides her, refers to her sisters, sees her nude, etc.).

From the standpoint of "storyology" from which we are mainly considering the stories here purely as stories, the Swan Maidens formula is especially interesting as showing the ease with which a simple theme can be elaborated and contaminated by analogous ones. The essence of the story is the capture of a bride by a young man who seizes her garment and thus gets her in manu, as the Roman lawyers say. She bears him children, but, on recovering her garment, flies away and is no more heard of. Sometimes she superfluously imposes a tabu upon her husband, which he breaks and she disappears (Melusine variant; compare Lohengrin). This is the effective and affecting incident of which Matthew Arnold makes such good use in his Merman. It could obviously be used, as Mr. Hartland points out, in a quasi-mythological manner to account for supernatural ancestry, as in the cases of the physicians of Myddvai in Wales, or of the Counts of Lusignan. But on this simple basis folk tellers have developed elaborations derived from other formulas. In several cases, notably in the Arabian Nights (Jamshah and Hasan of Bassora), the capture of the swan maiden is preceded by the Forbidden Chamber formula. Then when the bride flies away there is the Bride-Quest, which is often helped by Thankful Animals and aided by the Magical Weapons. When the hero reaches the home of the bride he has often to undergo a Recognition-Test, or even is made to undertake Acquisition Tasks derived from the Jason formula; and even when he obtains his wishes in many versions of the story there is the Pursuit with Obstacles also familiar from the same formula.