folklorist Joseph Jacobs considered to be a "well-known Continental folk-tale" (in regards to The Seven Swans (or Ravens)). Thus, according to Sabine Baring Gould, the swan children tale was added to the Knight of the Swan to provide an explanation for the latter. Similarly, French scholar Gédeon Huet, complementing Gaston Paris's study on the tale, argued that Dolopathos reworked two folktales: "The Brothers Transformed into Birds" (future tale type ATU 451) and "The Sisters Jealous of their Cadette" (future type ATU 707). German scholar also claimed that the narrative was a combination of two parts: Genoveva or Calumniated Wife (of possible Germanic origin) and the story of a sister rescuing her brothers from an animal transformation (of possible Celtic origin). In the same vein, professor Anne E. Duggan remarked that the narrative seems to be a "hybrid story" that "fused" the theme of the Calumniated Wife, the Knight of the Swan, and the "Germanic fairy tale" about swan-children. Dutch folklorist Jurjen van der Kooi was of the same opinion that Johannes "combined" three tales: type ATU 451, the story of the Swan Knight and the marriage between man and a "waterwoman" (which he calls "Melusine motif"). Dolopathos Included in Johannes de Alta Silva's Dolopathos sive de Rege et Septem Sapientibus (ca. 1190), a Latin version of the Seven Sages of Rome is a story of the swan children which has served as a precursor to the poems of the Crusade cycle. The tale was adapted into the French Li romans de Dolopathos by the poet Herbert. The story is as follows: A nameless young lord becomes lost in the hunt for a white stag and wanders into an enchanted forest where he encounters a mysterious woman (clearly a swan maiden or fairy) in the act of bathing, while clutching a gold necklace. They fall instantly for each other and consummate their love. The young lord brings her to his castle, and the maiden (just as she has foretold) gives birth to a septuplet, six boys and a girl, with golden chains about their necks. But her evil mother-in-law swaps the newborn with seven puppies. The servant with orders to kill the children in the forest just abandons them under a tree. The young lord is told by his wicked mother that his bride gave birth to a litter of pups, and he punishes her by burying her up to the