Yesterday marked the 147th anniversary of the Civil War battle at Antietam, the single bloodiest day in US history, with more than 20,000 men killed or wounded. 300 New Yorkers are still unaccounted for from that battle. But last summer, a hiker in an area known as the Corn Field discovered the remains of a soldier. His buttons and his belt identified him as a volunteer from New York. That soldier was finally laid to rest yesterday at Saratoga National Cemetery. Here’s Brian Mann’s audio portrait of the ceremony.