Forty-one years after his death, JRR Tolkien’s translation of Beowulf has been published by his son Christopher. Tolkien translated Beowulf early in his career, yet never published it. In the New Yorker, Joan Acocella speculates on the reason:
Another possible explanation for Tolkien’s putting “Beowulf” aside—a theory that has been advanced in the case of many unpublished manuscripts—is that the work was so important to him that if he finished it his life, or the life of his mind, would be over. I think this makes some sense. “Beowulf” was Tolkien’s lodestar. Everything he did led up to or away from it.