"Jeffers was a very strange man and poet, with an enormous component of cruelty and violence in his work. He had incredible sympathy with animals. He could give you an animal in a word or two like very few poets can. I think he honestly felt them, even though he often perceives them through violence. I can't explain Jeffers, he has always awed and annoyed me. I'm grateful to him as one of my predecessors writing about California. Even as a teenager, I knew he had California right. The poem that most reveals Jeffers's self-hatred is the one about the cavemen who torment a mammoth to death. They trap it and roast it alive. He's full of this kind of disgust for humanity. Yet he soars out into a great vision; never a happy vision, but a great vision. He's a difficult case when you're talking about animals."
January 1, 1970
https://en.wikiquote.org/wiki/Robinson_Jeffers