Tolkien briefly mentions the Awakening of Men and then over 300 years later they appear in Beleriand with fully-formed culture and an apparently exciting and interesting history that's barely hinted at in the Athrabeth Finrod Ah Andreth.
The latter describes an oral tradition passed down through many generations, so while the Tale Of Adanel may contain a core of truth, the precise details of their ancestors' lives would naturally become embellished or forgotten according to each storyteller's memory and understanding, morphing and evolving over time.
The stories in this series explore the possible early history of Adanel's ancestors, the keepers of their wisdom traditions. (Adanel and her Brother happen to themselves be the ancestors of most of the First Age Edain and Peredhil heroes.)
Fanwork Information