Thor sprang upon the giant Elle. Like a demon of the under world he fought, and for a time even this All-conquering giant swayed before the wild madness of his bursts of thunder, and his crashing, hissing bolts of fire. But alas for Thor! Even his godlike strength was doomed to fail him. He trembled; his sight vanished; a strange chill settled over him, and he sank, conquered, before the power of the giant Elle. And now the night had fallen upon the land. The light had faded from the mountain tops; and the chill of night was in the frosty air. Exhausted, the great god wrapped himself about and sank into heavy sleep. And his dreams were of great battles, of terrible foes, and of the last great day which, sometime in the ages to come, should fall upon the city of the gods, and in which even the power of Odin should fail, and the light go out from all the earth. All night long these dreams haunted the great heart of Thor; and in the morning the people in Midgard said, "It was a strange night. Through all the hours of darkness, the thunders rolled in the distance, and the pale lightnings flashed among the mountain peaks beyond the seas." In the morning, even with the first rays of light, Thor, with Loke and Thjalfe and Roskva, set forth upon their journey homeward. There was a terrible blackness upon the face of Thor, and the thunders rumbled deeply. Never before had Thor known the bitterness of defeat, and he returned to Asgard and to Odin sick at heart. "Lose not thy courage, Thor," said the All-wise. "Know that thou art not even now defeated in any test of true strength. Utgard-Loke has triumphed to be sure; but even he trembles now, and has closed the doors of his castle, and has set thousands upon thousands of sentinels to watch against thy return. "The horn from which thou didst drink reached far down into the depths of the sea; and the people of Midgard even now throng the shores and wonder what power in heaven or in earth can so have shrunken the great waters of the sea. "Loge, with whom Loke contended, was none less than Wild Fire; and Huge was Thought itself. Even the gods, even Odin himself, with these would but contend in vain. And Elle--it is indeed as Utgard-Loke said--no power in heaven itself can equal hers. She is the all-powerful, the never-failing, the ever-present Old Age. All the people of the earth, all the gods of Asgard--aye, even the Earth and Asgard must one day fall before her mighty will. That you contended even as you did, has driven terror deep into the hearts of the cruel Frost giants; nor do they doubt that you are the terrible god of Thunder, the greatest of all the sons of Odin." XX. THOR AND THE MIDGARD SERPENT. With these words of Odin, Thor's courage rose. "Bring me my hammer," he called to Sif, "and again will I go forth into the realms of the Frost giants."