The secret behind Sabine River boundary

Acareer diplomat told President Andrew Jackson on Dec. 16, 1829 the inside story of how the Sabine River became the dividing line between Louisiana and Spanish territory -- a political bombshell Old Hickory waited 15 years to drop.The 1803 treaty that closed the sweetest land deal in American history -- the Louisiana Purchase -- failed to set hard and fast boundaries. Negotiations with S...