Appleton Oaksmith was a swashbuckling Civil War-era sea captain whose life intersected with some of the most important moments, movements, and individuals of the mid-19th century, from the California Gold Rush, filibustering schemes in Nicaragua, Cuban liberation, and the Civil War and Reconstruction. But in his life we also see the extraordinary lengths the Lincoln Administration went to destroy the illegal trans-Atlantic slave trade. That’s because he spent years working as an outlaw mariner for the Confederacy and later against the Klan.

Oaksmith lived in the murky underworld of New York City, where federal marshals plied the docks in lower Manhattan in search of evidence of slave trading. Once they suspected Oaksmith, federal authorities had him arrested and convicted, but in 1862 he escaped from jail and became a Confederate blockade-runner in Havana. The Lincoln Administration tried to have him kidnapped in violation of international law, but the attempt was foiled. Always claiming innocence, Oaksmith spent the next decade in exile until he received a presidential pardon from U.S. Grant, at which point he moved to North Carolina and became an anti-Klan politician.

To look at this story is today’s guest, Jonathan White, author of “Shipwrecked: A True Civil War Story of Mutinies, Jailbreaks, Blockade-Running, and the Slave Trade.”