Hildebrand's Pupil--Alberich the Dwarf--Grim and Hilde--The Magic Sword--Conflict in the Cavern--Giant and Hag are slain--Great Sigenot--Dietrich taken Prisoner--In the Dragon's Lair--Hildebrand put to Shame--Giant overcome--Heime's Challenge--Wieland's son Witege--Fierce Combat --Dietrich in Peril--Peace Terms. DIETRICH was the son of great Dietmar, King of Bern, whose brother was the fierce King Ermenrich. He was but seven years old when there came to his father's Court the battle hero…