Watched The Celtic World by Jennifer Paxton from The Teaching Company, LLC.

Lecture 14: Medieval Irish Literature
The early Irish prized literary skill just as much as prowess in warfare, and lords were judged by the quality of poet they could hire. This lecture gives a glimpse into the diverse genres of Irish literature, from epics about mythological heroes to exciting tales designed to warn kings about the dangers of ruling unjustly.

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Interesting idea about memory here between 6 an 12 minutes.
One of the stories has someone ask to be taught about farming as a condition which says something about information spread and education.