Daily, monthly, yearly we watched the Negro grow grayer and more stooped, going in and out with the market basket. Each December we sent her a tax notice, which would be returned by the post office a week later, unclaimed. Now and then we would see her in one of the downstairs windows--she had evidently shut up the top floor of the house--like the carven torso of an idol in a niche, looking or not looking at us, we could never tell which. Thus she passed from generation to generation--dear, inescapable, impervious, tranquil, and perverse.