and Sorbi laid the country waste as far as Bremen. The Emperor was, meanwhile, engaged with the Saxons. On one occasion Henry narrowly escaped being taken prisoner, being merely saved by the stratagem of his faithful servant, Thiatmar, who caused the Emperor to retreat by falsely announcing to him the arrival of a body of auxiliaries. At length a pitched battle was fought near Merseburg, in 915, between Henry and Eberhard, the Emperor's brother, in which the Franks[24] were defeated, and the superiority of the Saxons remained, henceforward, unquestioned for more than a century. The Emperor was forced to negotiate with the victor, whom he induced to protect the northern frontiers of the empire while he applied himself in person to the reëstablishment of order in the south. [Footnote 24: So great a slaughter took place that the Saxons said on the occasion: "'Twere difficult to find a hell Where so many Franks might dwell!"] In Swabia, Salomon, Bishop of Constance, who was supported by the commonalty, adhered to the imperial cause, while the kammerboten were unable to palliate their treason, and were gradually driven to extremities. Erchanger, relying upon aid from Arnulf and the Hungarians, usurped the ducal crown and took the bishop prisoner. Salomon's extreme popularity filled him with such rage that he caused the feet of some shepherds, who threw themselves on their knees as the captured prelate passed by, to be chopped off. His wife, Bertha, terror-stricken at the rashness of her husband, and foreseeing his destruction, received the prisoner with every demonstration of humility, and secretly aided his escape. He no sooner reappeared than the people flocked in thousands around him. "_Heil Herro! Heil Liebo!_" ("Hail, master! Hail, beloved one!") they shouted, and in their zeal attacked and defeated the traitors and their adherents. Berthold vainly defended himself in his mountain stronghold of Hohentwiel. The people so urgently demanded the death of these traitors to their country that the Emperor convoked a general assembly at Albingen in Swabia, sentenced Erchanger and Berthold to be publicly beheaded, and nominated Burkhard, in 917, whose father and uncle had been assassinated by order of Erchanger, as successor to the ducal throne. Arnulf withdrew to his fortress at Salzburg, and quietly awaited more favorable times. His name was branded with infamy by the people, who henceforth affixed to it the epithet of "the Bad," and the _Nibelungenlied_ has perpetuated his detested memory.