20 New Lines from The Epic of Gilgamesh Discovered in Iraq, Adding New Details to the Story | Open Culture Excerpt from full article:
...these extra lines that not only add to the poem’s length, but have now cleared up some of the mysteries in the other chapters. These lines come from Chapter Five of the epic and cast the main characters in a new light. Gilgamesh and his companion Enkidu are shown to feel guilt over killing Humbaba, the guardian of the cedar forest, who is now seen as less a monster and more a king. Just like a good director’s cut, these extra scenes clear up some muddy character motivation, and add an environmental moral to the tale.