CHAPTER XLIV. STEAMBOATING ON THE MISSISSIPPI IN PEACE AND WAR. Attempts to Obstruct the Great River .-- Chains, Booms, and Batteries .-- A Novelty in Piloting .-- Travel in the Days Before the Rebellion .-- Trials of Speed .-- The Great Race .-- Travel During the War .-- Running a Rebel Battery on the Lower Mississippi .-- Incidents of the Occasion .-- Comments on the Situation..