Archaeologists have solved a 150-year mystery at one of the nation’s most remote national parks. A team of National Park Service (NPS) archaeologists announced on March 31 that they found the lost grave of George Tupper, a soldier who died in 1873 at Dry Tortugas National Park in the Florida Keys. Tupper is the only known service member to have been buried within the walls of the park’s historic military Fort Jefferson. Dry Tortugas is one of the most remote national parks in the country. Composed of seven small islands and coral reefs, the park lies 70 miles west of Key West, Florida, and is accessible only by boat or seaplane. At the heart of Dry Tortugas is Fort Jefferson, a 19th-century U.S. military post that the Union used during the Civil War. “Locating Private Tupper’s original grave allows us to honor him and the service members who lived and served at Dry Tortugas,” NPS archaeologist Josh Marano said in a statement. “It is also a great reminder of why careful survey work be...