Clark Street, just north of Chicago's Loop, was the symbol of a million things, all of them bad, Manning thought. Bumpy paving bricks rutted with street car tracks and bordered on both sides by cheap saloons and quarter-a-night flop houses. Hot summer nights when the drunks clustered like flies on the sidewalks and Newberry Park was crowded with cranks trying to save the world and floozies just trying to make a living in it. Old magazine stores where a nickle bought a copy of an old comic magazi