LIFE AT HEADQUARTERS ARMY OF POTOMAC—SOME STARTLING REVELATIONS AS TO THE "TRUE INWARDNESS," NOT TO SAY CUSSEDNESS, OF OUR HIGH UNION OFFICIALS—INTERESTING DESCRIPTIONS OF FAMILY LIFE AT HEADQUARTERS—"SIGNALS"—CIPHERS—AGAIN VOLUNTEERING FOR SECRET SERVICE INSIDE THE REBEL ARMY—A REMARKABLE STATEMENT ABOUT BURNSIDE AND HOOKER—INTRODUCTION TO GENERAL MEADE—A NIGHT AT RAPPAHANNOCK INTERVIEWING REBEL PICKETS.CONSPIRACIES AMONG UNION GENERALS AND NORTHERN POLITICIANS—THE DEFENSE OF THAT UNAPPRECIATED ARMY, THE CAVALRY—HOOKER AND DEAD CAVALRYMEN—STONEMAN'S CELEBRATED RAID TO RICHMOND TRUTHFULLY DESCRIBED, AND ITS FAILURE TO CAPTURE RICHMOND ACCOUNTED FOR—A CHAPTER ON THE "SECRET SERVICE" NOT REFERRED TO IN OFFICIAL REPORTS OR CURRENT WAR HISTORY.CHAPTER XXX.