I could have sworn I posted I had finished this already. I can't find it, though. No telling what I clicked.
Well, I finished this by listening to the audio (free librivox) version. Much better to listen to than to read it. Not one of my favorite books, but glad that I finished it. Part III was better than part I or part II, but still slow going. The ending was a bit much and even more hard to believe than the whole story before it.
Maybe, I was not in the right frame of mind to fully enjoy the story.