In this legend we have a combination of many tales. The central incident of the magical ring recovered from the depth of the sea inside the fish, upon which the whole future depended, is somewhat obscure in this tale. It is part of the Polykrates tale, but still more so of the Solomonic legend, where the recovery of the ring means the recovery of power by King Solomon. It is a curious romance, in which Solomon is married as a poor man, i.e. in disguise, to a princess, for his ring by which he was able to rule all the spirits and demons had been cast into the sea by a demon and swallowed by a fish. From that fish Solomon recovered it later on, and with it his kingdom and power. The incident of the sword and the threads is an obscure episode. No doubt it is a magical sword, by which the power of the ogre is to be broken, and the threads are magical threads, by which he is to be tied and made powerless.
The Story of the Swallow and Holy Mother Sunday.
In another tale the swallow was originally a servant of Holy Sunday. Holy Sunday, going to church, told her servant, whom she had left at home, that she was to prepare the dinner for her, and that she should take care that it should neither be too hot nor too cold, but just as she liked it best. The servant remaining at home did as she was told; she cooked the dinner, but forgot to take the food off the hob in time to get it cool enough for Holy Sunday when she came home from church.
When Holy Sunday came home and began to eat the food burned her mouth, as it was too hot, having been left on the fire so much too long. So she got very angry, and cursed the servant, saying, "As thou hast not done my will and hast burned me with the food, so mayest thou now be henceforth a bird burned and frizzled up by the great heat of the places and the countries where thou shalt dwell."
No sooner had Holy Sunday spoken these words, when the servant girl was changed into a swallow, and therefore it makes its nest in the lofts of houses where it is hottest, and travels the countries where the sun is burning like fire, frizzling up the inhabitants with its heat.
Holy Sunday is here merely a Christianised form of some of the older divinities, who did not scruple at the slightest provocation to vent their feelings and to punish their sub-ordinates without pity and without mercy.