Answer:
Man Vs. Man
Explanation:
The entire premise of the story is that two men are hunting each other on account of hatred derived from a centuries old land dispute. Society Notwithstanding the ingrained hatred the two men have for each other, they recognize the societal constraints placed on would-be-murderers.
Well, using my limited knowledge, "cleaving" means to chop, break in half, split, etc. Twain means twice. So, perhaps it's like "you've broke my heart in half", something along those lines? hopefully this helps you.
Answer:
I think the answer is the oak tree..... I hope it is.