Webster’s Revised Unabridged Dictionary · 1913
Saga
Sa′ga (sā′gȧ), n.; pl. Sagas (-gȧz). [Icel., akin to E. saw a saying. See Say, and cf. Saw.] A Scandinavian legend, or heroic or mythic tradition, among the Norsemen and kindred people; a northern European popular historical or religious tale of olden time.
And then the blue-eyed Norseman told A saga of the days of old. Longfellow.