From Algiers Leo proceeded to Bugia, where he found Barbarossa, whose active genius would admit of no relaxation or repose, laying siege to the fortress; before he had advanced many leagues towards the east, however, he heard the news of the death of this redoubted chief, who, being cut off at Telemsan, was succeeded in the sovereignty of Algiers by his brother Kairaddin. It was at this time that the Emperor Charles V. turned his victorious arms against Algiers, where, meeting with a severe check from Barbarossa, part of his chivalry falling on the plain and part being taken, his pride was humbled and his glory tarnished by the intrepid valour of a troop of banditti. Proceeding eastward from Bugia through many towns of inferior note, yet in many instances bearing marks of a Roman origin, he arrived in a few days at Kosantina, a city undoubtedly founded by the Romans, and at that period surrounded by strong walls of black hewn stone, erected by the founders. It was situated upon the southern slope of a lofty mountain, hemmed round by tremendous rocks, between which, through a deep and narrow channel, the river Sufegmare wound round a great portion of the city, forming, as far as it went, a natural ditch. Two gates only, the one opening towards the rising, the other towards the setting sun, lead into the place; on the other sides enormous bastions or inaccessible precipices prohibit all approach to the city, which at that period was extremely populous, and adorned with magnificent public buildings, such as monasteries, colleges, and mosques. The inhabitants, who were a warlike and polished people, carried on an extensive trade in oil and silk with the Moors of the interior, receiving in return slaves and dates, the latter of which Leo here found cheaper and more plentiful than in any other part of Barbary.