Original: Two major tragedies occurred during the reign of Louis Bonaparte : the explosion of a cargo ship loaded with gunpowder in the heart of the city of Leiden in 1807 , and a major flood in Holland in 1809 .
Simplified: Two major tragedies occurred during his reign : the explosion of a ship filled with gunpowder in the heart of the city of Leiden in 1807 , and a major flood in 1809 .