Just four days before Enron disclosed a stunning $618 million loss for the third quarter -- its first public disclosure of its financial woes -- workers who audited the company's books for Arthur Andersen, the big accounting firm, received an extraordinary instruction from one of the company's lawyers. Congressional investigators tell Time that the Oct. 12 memo directed workers to destroy all audit material, except for the most basic "work papers." And that's what they did, over a period of several weeks.