
1) Skaldic poem
Found on
https://www.crosswordclues.com/clue/sonatorrek

Sonatorrek (`the irreparable loss of sons`) is a skaldic poem in 25 stanzas by Egill Skallagrímsson (ca. 910–990). The work laments the death of two of the poet`s sons, Gunnar, who died of a fever, and Böðvarr, who drowned during a storm. It is preserved in Egils saga Skalla-Grímssonar, ch. 78, which is included in the 14th-century compil......
Found on
http://en.wikipedia.org/wiki/Sonatorrek

(from the article `Egill Skallagrímsson`) ...two of his sons, Egill locked himself in his enclosed bed and refused food. His daughter coaxed him into writing a poem; so he composed ( 961) the ...
Found on
http://www.britannica.com/eb/a-z/s/125
No exact match found.