The empress entreated in pitiful accents for the return of her son, but in vain; the captors of the boy were not of the kind to let pity interfere with their plans; on down the broad stream glided the vessel, the treacherous vassals listening in silence to the agonized appeals of the distracted mother, and to the mingled prayers and demands of the young emperor to be taken back. The country people, furious on learning that the emperor had been stolen, and was being carried away before their eyes, pursued the vessel for some distance on both sides of the river. But their cries and threats were of no more avail than had been the mother's tears and prayers. The vessel moved on with increasing speed, the three kidnappers erect on its deck, their only words being those used to cajole and quiet their unhappy prisoner, whom they did their utmost to solace by promises and presents. The vessel continued its course until it reached Cologne, where the imperial captive was left under the charge of the archbishop, his two confederates fully trusting him to keep close watch and ward over their precious prize. The empress was of the same opinion. After vainly endeavoring to regain her lost son from his powerful captors, she resigned the regency and retired with a broken heart to an Italian convent, in which the remainder of her sad life was to be passed. The unhappy boy soon learned that his new lot was not to be one of pleasure. He had a life of severe discipline before him. Bishop Hanno was a stern and rigid disciplinarian, destitute of any of the softness to which the lad had been accustomed, and disposed to rule all under his control with a rod of iron. He kept his youthful captive strictly immured in the cloister, where he had to endure the severest discipline, while being educated in Latin and the other learning of the age. The regency given up by Agnes was instantly assumed by the ambitious churchman, and a decree to that effect was quickly passed by the lords of the diet, on the grounds that Hanno was the bishop of the diocese in which the emperor resided. The character of Hanno is variously represented by historians. While some accuse him of acts of injustice and cruelty, others speak of him as a man of energy, yet one whose holy life, his paternal care for his see, and his zealous reformation of monasteries and foundation of churches, gained him the character of a saint.