はしょってしまった感じですみません。
これ、夫婦なんですよね？
彼と私の孫と書かれていて、彼の孫と私の孫が別なのかと最初思いました。
morepork　が鳴くのは不吉なのでしょうか？

I wait in sadness. I fell asleep in the tent after they had gone to the river and I had a dream of him. In the dream, he said "I go but no weeping, it is my time." My sadness becomes deeply all the more when the morepork cried above my head.
Every year we come to the river to catch eels. I think we are too old to travel all the way to the river with our stuffs and to fetch the eels even more. I suggested him we let the young ones go. But he insisted on going by himself.
The night before we worked we all prepared for the torches. Young ones made their eel hooks. The experienced and elder people told them the eel hooks were good for eels but not for the leg. Young ones just made fun of him far from following the advice.
While waiting I saw two lights come near, those brought me sad news. I saw the tears on boy's faces. The boys told me what happened and they blamed themselves because they spoke bad words to him. We wept together. Although I comforted them, so lonely night as the morepork cried and more sorrow he never comes back.