On January 15, 1831, Victor Hugo finishes writing Notre Dame de Paris, also known as The Hunchback of Notre Dame. Distracted by other projects, Hugo had continually postponed his deadlines for delivering the book to his publishers, but once he sat down to write it, he completed the novel in only four months.

Jedediah Smith, one of the nation’s most important trapper-explorers, is killed by Comanche tribesman on the Santa Fe Trail.

Believing himself chosen by God to lead his people out of slavery, Nat Turner launches the largest-ever insurrection by enslaved people in the United States. Turner, an enslaved man and educated minister, planned to capture Virginia's Southampton county armory and then march 30 miles to Dismal Swamp, where his rebels would be able to elude their pursuers. With seven followers, he killed Joseph Travis, his owner, and Travis’ family, and then set off across the countryside, hoping to rally hundreds of enslaved people to his insurrection en route to the armory.

Nat Turner, the leader of a bloody revolt of enslaved people in Southampton County, Virginia, is hanged in Jerusalem, the county seat, on November 11, 1831.

British naturalist Charles Darwin sets out from Plymouth, England, aboard the HMS Beagle on a five-year surveying expedition of the southern Atlantic and Pacific oceans. Visiting such diverse places as the Galapagos Islands and New Zealand, Darwin acquired an intimate knowledge of the flora, fauna, and geology of many lands. This information proved invaluable in the development of his theory of evolution, first put forth in his groundbreaking scientific work of 1859, On the Origin of Species by Means of Natural Selection.