Presently, as he pursued his vain search for the animal, he saw to his amazement an open door, leading apparently into the heart of the glacier. He was a fearless man, and so, without hesitation, he passed boldly through the doorway and found himself standing in a marvellous cavern, lit up by blazing torches which gleamed upon rich jewels hanging from the roof and walls. And in the midst stood a woman, most fair to behold, clad in snow-white robes and surrounded by a group of lovely maidens. The shepherd's boldness gave way at this awesome sight, and he sank to his knees before the Asa, Frigga, for she it was. But Frigga bade him be of good cheer, and said: "Choose now whatsoever you will to carry away with you as a remembrance of this place." The shepherd's eyes wandered over the glittering jewels on the walls and roof, but they came back to a little bunch of blue flowers which Frigga held in her hand. They alone looked homelike to him; the rest were hard and cold; so he asked timidly that he might be given the little nosegay. Then Frigga smiled kindly upon him. "Most wise has been your choice," said she. "Take with the flowers this measure of seed and sow it in your field, and you shall grow flowers of your own. They shall bring prosperity to you and yours." So the shepherd took the flowers and the seed, and scarcely had he done so when a mighty peal of thunder, followed by the shock of an earthquake, rent the cavern, and when he had collected his senses he found himself once more upon the mountain side. When he reached home and had told his tale, his wife scolded him roundly for not bringing home a jewel which would have made them rich for ever. But when she would have thrown the flowers away he prevented her. Next day he sowed the seed in his field, and was surprised to find how far it went. Very soon after this the field was thick with tiny green shoots; and though his wife reproached him for wasting good ground upon useless flowers, he watched and waited in hope until the field was blue with the starry flax blooms. Then one night, when the flowers had withered and the seed was ripe, Frigga, in the disguise of an old woman, visited the lowly hut and showed the shepherd and his astonished wife how to use the flax stalks; how to spin them into thread, and how to weave the thread into linen. It was not long before all the dwellers in that part of the earth had heard of the wonderful material, and were hurrying to the shepherd's hut to buy the bleached linen or the seed from which it was obtained. And so the shepherd and his family were soon among the richest people in the land; and the promise of Frigga was amply fulfilled. CHAPTER IV How a Giant Built a Fortress for the Asas _This is the tale the Northmen tell of how a giant once built a fortress for the Asas._