Nineteenth-century engineer who designed and built Confederate submarines through the Civil Battle era. His best-known submarine, the H.L. Hunley, was called in his honor. Before building his initial submarine, the Pioneer, he proved helpful as an attorney and held a chair in the Louisiana Condition Legislature. Before its sinking, his H.L. Hunley was the initial naval vessel ever sold to kitchen sink an foe submarine (the USS Housatonic). He was created in Sumner State, Tennessee and elevated in New Orleans, Louisiana. He passed away within a failed submarine workout and was buried in Charleston, SC. He and Whitcomb L. Judson had been both Civil War-era inventors.