Secondly, the prince must hide and the king must look for him (which the prince accomplishes with the help of the mare). After the youngest prince returns with the Bird of the Golden Land to the hut of the old woman, she reveals she is a queen, the mare is another queen and the Bird itself is a third queen. Southern Europe Galician ethnographer publihsed a Galician tale titled O Páxaro de Ouro, wherein the king owns an orchard where there is a tree with red Portuguese apples that are stolen by the titular golden bird. He is helped by a fox and completes the quest by obtaining a golden horse and a princess with golden hair. The "Istituto centrale per i beni sonori ed audiovisivi" ("Central Institute of Sound and Audiovisual Heritage") promoted research and registration throughout the Italian territory between the years 1968–1969 and 1972. In 1975 the Institute published a catalog edited by and Liliana Serafini reported 13 variants of type 550 across Italian sources, under the name La Ricerca dell'Uccello d'Oro. Author Wentworth Webster published two Basque tales: he summarized one wherein the youngest of three princes obtains the water of life to heal his father, a magic horse and a bird. In another, titled The White Blackbird, the third prince quests for a white blackbird to cure his blind father, the king, as well as a young lady from the king's house and a very beautiful horse. Germany Folklorist Jeremiah Curtin noted that the Russian, Slavic and German variants are many, such as Die drei Gärtnerssöhne ("The gardener's three sons"); or Der Goldvogel, das Goldpferd und die Prinzeßin, by German theologue Johann Andreas Christian Löhr. In the Plattdeutsche (Low German) variant collected by Wilhelm Wisser, Vagel Fenus, the protagonist searches for the bird Fenus because his father dreamt that it could restore his health, while in the tale De gollen Vagel, the tale begins with the usual vigil at the garden to protect the tree of golden apples. In a variant from Flensburg, Guldfuglen ("Goldbird"), the gardener's youngest son, with the help of a fox, searches for the White Hart and the "White Maiden" ("hivde Jomfru"). Romania In a Romanian variant, Boy-Beautiful, the Golden Apples, and the Were-Wolf, the sons of the emperor investigate who has been eating the emperor's prized apples, and the youngest prince (possibly Făt-Frumos) finds two shining golden feathers in the