Aben Habuz smiled at what he considered a pleasantry of the ancient man; but when he found him to be in earnest, his gray beard trembled with indignation. “Son of Abu Ayub,” said he, sternly, “what equivocation is this? Thou knowest the meaning of my promise: the first beast of burden, with its load, that should enter this portal. Take the strongest mule in my stables, load it with the most precious things of my treasury, and it is thine; but dare not raise thy thoughts to her who is the delight of my heart.” “What need I of wealth?” cried the astrologer, scornfully; “have I not the book of knowledge of Solomon the Wise, and through it the command of the secret treasures of the earth? The princess is mine by right; thy royal word is pledged; I claim her as my own.” The princess looked down haughtily from her palfrey, and a light smile of scorn curled her rosy lip at this dispute between two gray-beards for the possession of youth and beauty. The wrath of the monarch got the better of his discretion. “Base son of the desert,” cried he, “thou mayst be master of many arts, but know me for thy master, and presume not to juggle with thy king.” “My master! my king!” echoed the astrologer,--“the monarch of a mole-hill to claim sway over him who possesses the talismans of Solomon! Farewell, Aben Habuz; reign over thy petty kingdom, and revel in thy paradise of fools; for me, I will laugh at thee in my philosophic retirement.” So saying, he seized the bridle of the palfrey, smote the earth with his staff, and sank with the Gothic princess through the centre of the barbican. The earth closed over them, and no trace remained of the opening by which they had descended. Aben Habuz was struck dumb for a time with astonishment. Recovering himself, he ordered a thousand workmen to dig, with pickaxe and spade, into the ground where the astrologer had disappeared. They digged and digged, but in vain; the flinty bosom of the hill resisted their implements; or if they did penetrate a little way, the earth filled in again as fast as they threw it out. Aben Habuz sought the mouth of the cavern at the foot of the hill, leading to the subterranean palace of the astrologer; but it was nowhere to be found. Where once had been an entrance, was now a solid surface of primeval rock. With the disappearance of Ibrahim Ebn Abu Ayub ceased the benefit of his talismans. The bronze horseman remained fixed, with his face turned toward the hill, and his spear pointed to the spot where the astrologer had descended, as if there still lurked the deadliest foe of Aben Habuz.