Who can count, however, upon the tranquil content of a heart nurtured amid the storms of war and ambition! Under the ashes of this outward humility were glowing the coals of faction. In his seemingly philosophical retirement, Samael was concerting with his friends new treason against Abderahman. His plot was discovered; his house was suddenly surrounded by troops; and he was conveyed to a tower at Toledo, where, in the course of a few months, he died in captivity. The magnanimity of Abderahman was again put to the proof, by a new insurrection at Toledo. Hixem ben Adra, a relation of Yusuf, seized upon the Alcazar, or citadel, slew several of the royal adherents of the king, liberated Casim from his tower, and, summoning all the banditti of the country, soon mustered a force of ten thousand men. Abderahman was quickly before the walls of Toledo, with the troops of Cordova and his devoted Zenetes. The rebels were brought to terms, and surrendered the city on promise of general pardon, which was extended even to Hixem and Casim. When the chieftains saw Hixem and his principal confederates in the power of Abderahman, they advised him to put them all to death. "A promise given to traitors and rebels," said they, "is not binding, when it is to the interest of the state that it should be broken." "No!" replied Abderahman, "if the safety of my throne were at stake, I would not break my word." So saying, he confirmed the amnesty, and granted Hixem ben Adra a worthless life, to be employed in further treason. Scarcely had Abderahman returned from this expedition, when a powerful army, sent by the caliph, landed from Africa on the coast of the Algarves. The commander, Aly ben Mogueth, Emir of Cairvan, elevated a rich banner which he had received from the hands of the caliph. Wherever he went, he ordered the caliph of the East to be proclaimed by sound of trumpet, denouncing Abderahman as a usurper, the vagrant member of a family proscribed and execrated in all the mosques of the East. One of the first to join his standard was Hixem ben Adra, so recently pardoned by Abderahman. He seized upon the citadel of Toledo, and repairing to the camp of Aly, offered to deliver the city into his hands. Abderahman, as bold in war as he was gentle in peace, took the field with his wonted promptness; overthrew his enemies, with great slaughter, drove some to the seacoast to regain their ships, and others to the mountains. The body of Aly was found on the field of battle. Abderahman caused the head to be struck off, and conveyed to Cairvan, where it was affixed at night to a column in the public square, with this inscription: "Thus Abderahman, the descendant of the Omeyas, punishes the rash and arrogant." Hixem ben Adra escaped from the field of battle, and excited further troubles, but was eventually captured by Abdelmelee, who ordered his head to be struck off on the spot, lest he should again be spared, through the wonted clemency of Abderahman.