On December 15, 1811, two of Thomas Jefferson's nephews murdered a slave in cold blood and put his body parts into a roaring fire. The evidence would have been destroyed but for a rare act of God -- or, as some believed, of the Indian chief Tecumseh.
That same day, the Mississippi River's first steamboat, piloted by Nicholas Roosevelt, powered itself toward New Orleans on its maiden voyage. The sky grew hazy and red, and jolts of electricity flashed in the air. A prophecy by Tecumseh was about to be fulfilled.
He had warned reluctant warrior-tribes that he would stamp his feet and bring down their houses. Sure enough, between December 16, 1811, and late April 1812, a catastrophic series of earthquakes shook the Mississippi River Valley.