http://www.imperial-library.info/content/seven-fights-aldudagga

Are the unwritten songs just lost, or have they yet to happen? Because I'm reading these carefully, and I'm with the impression Akatosh and Mehrunes Dagon have only fought once. I believe the Nords add to them as they see the Fights occur: "The songs herein are attributed to Bretonordic skalds of unknown number," may mean a thousand authors or just a few. I was wondering if anybody here knew what kind of purpose they'd serve for the Nords, whether profane (common) or cultic (religious).

Thanks!