The lines from 60 to 69 spell out the tragic ending of the illicit love affair between Tristan and Isolde.
Notice the use of the words tomb, death, and doom in lines 63-66:
Little dreaming hours would come;
Life pale shadows from the tomb
When an open death of doom
Had been still less hard to bear
Tristan and Isolde was written in the 12th century by a German Poet called Eilhart Von Oberg.
The poem features a tragic love affair (albeit unlawful) between the knight Tristan and the Irish Princess - Iseult (also spelled Isolde, or Yseult).
Learn more in the link below about the poem Tristan and Iseult:
https://brainly.com/question/24968145