The different _chansons de gestes_ relating to Aymon and the necromancer Malagigi (Malagis), probably arose from popular ballads commemorating the struggles of Charles the Bald and his feudatories. These ballads are of course as old as the events which they were intended to record, but the _chansons de gestes_ based upon them, and entitled "Duolin de Mayence," "Aymon, Son of Duolin de Mayence," "Maugis," "Rinaldo de Trebizonde," "The Four Sons of Aymon," and "Mabrian," are of much later date, and were particularly admired during the fourteenth and fifteenth centuries. One of the most famous of Charlemagne's peers was doubtless the noble Aymon of Dordogne; and when the war against the Avars in Hungary had been successfully closed, owing to his bravery, his adherents besought the king to bestow upon this knight some reward. Charlemagne, whom many of these later _chansons de gestes_ describe as mean and avaricious, refused to grant any reward, declaring that were he to add still further to his vassal's already extensive territories, Aymon would soon be come more powerful than his sovereign. [Sidenote: War between Aymon and Charlemagne.] This unjust refusal displeased Lord Hug of Dordogne, who had pleaded for his kinsman, so that he ventured a retort, which so incensed the king that he slew him then and there. Aymon, learning of the death of Lord Hug, and aware of the failure of his last embassy, haughtily withdrew to his own estates, whence he now began to wage war against Charlemagne. Instead of open battle, however, a sort of guerrilla warfare was carried on, in which, thanks to his marvelous steed Bayard, which his cousin Malagigi, the necromancer, had brought him from hell, Aymon always won the advantage. At the end of several years, however, Charlemagne collected a large host, and came to lay siege to the castle where Aymon had intrenched himself with all his adherents. [Sidenote: Loss of the horse Bayard.] During that siege, Aymon awoke one morning to find that his beloved steed had vanished. Malagigi, hearing him bewail his loss, bade him be of good cheer, promising to restore Bayard ere long, although he would be obliged to go to Mount Vulcanus, the mouth of hell, to get him. Thus comforted, Aymon ceased to mourn, while Malagigi set to work to fulfill his promise. As a brisk wind was blowing from the castle towards the camp, he flung upon the breeze some powdered hellebore, which caused a violent sneezing throughout the army. Then, while his foes were wiping their streaming eyes, the necromancer, who had learned his black art in the famous school of Toledo, slipped through their ranks unseen, and journeyed on to Mount Vulcanus, where he encountered his Satanic Majesty.