Those who hadn’t already been let out early for the Columbus Day weekend moved with more than their usual haste toward the buses and subways that would drain them from the city by the tens of thousands, emptying them into Jersey, Westchester, and Long Island, where supermarket inventories had already dropped a few points and the local banks had balanced their sheets for the week and sent their people home.Downstairs, the Open Market Desk would trade Treasury bills for another half hour but the volume would be light. Soon Fedwire would settle, clearing everything from corporate bond sales to the credit card purchases of the secretaries and mutual fund salesmen hurrying now along the street below. Over the weekend when these people went to the movies or the mall they would swipe their cards through magnetic strips and thus do what for centuries had been the sole province of kings and parliaments: they would create money. Short money to be sure, but money nonetheless, which until that moment had never appeared on a balance sheet or been deposited with a bank, that was nothing but a permission for indebtedness, the final improvisation in a long chain of governed promises.