Twain became somewhat bitter in his later years, even while projecting an amiable persona to his public. In private he demonstrated a stunning insensitivity to friends and loved ones. "Much of the last decade of his life, he lived in hell," wrote Hamlin Hill. He wrote a fair amount but was unable to finish most of his projects. His memory faltered. He had volcanic rages and nasty bouts of paranoia, and he experienced many periods of depressed indolence, which he tried to assuage by smoking cigars, reading in bed and playing endless hours of billiards and cards.