Mark Pittman, an investigative reporter for Bloomberg News ... filed a Freedom of Information Act request with the Federal Reserve Board, seeking the details of its unprecedented efforts to funnel money to the collapsing banks of Wall Street. That was in September 2008. Just more than a year later, Mr. Pittman ... died unexpectedly at age 52. But his cause has persevered. It is now known as Bloomberg L.P. v. Board of Governors of the Federal Reserve, an attempt to unlock the vault of the largest Wall Street rescue plan in decades - or, as the legal briefs put it, to break down a wall of secrecy" that the Fed has kept in place for nearly two years in its "controversial use of public money to prop up financial institutions." The Federal Reserve has wrapped itself in secrecy since the turn of the 20th century, when a select group of financiers met at the private Jekyll Island Club off the eastern coast of Georgia and, forgoing last names to preserve their anonymity among the staff, drafted legislation to create a central bank. Its secrecy, of course, persists today, with Ben S. Bernanke, the Federal Reserve chairman, refusing to tell even Congress which banks received government money under the bailout. There is also a heated battle to force the Fed to disclose its role in the controversial attempt to save the insurance giant American International Group.