I know that Twain published Grant's memoirs.But, i was speaking to an American History undergrad the other day and he told me when he studied Grant's memoirs, that he was taught that Twain ghost wrote much of them. He said it was obvious by the change in writing style in some parts of the writings. I had never heard this before. I told him I have my doubts that this is true but I don't know everything so I am asking....Any evidence of this? Carol J. Peiffer