The engineer Horace Lawson died at the age of 40. Here is all you want to know, and more!
Biography - A Short Wiki
Nineteenth-century engineer who designed and built Confederate submarines during the Civil War era. His best-known submarine, the H.L. Hunley, was named in his honor.
He was born in Sumner County, Tennessee and raised in New Orleans, Louisiana. He died in a failed submarine exercise and was buried in Charleston, South Carolina.