“None of us know the Lord’s will,” Burtis J. “Bert” Dolan wrote to his wife about his journey on the new airship, the Hindenburg. He had purchased his ticket for the trip on May 1, 1937, two days before setting off from Frankfurt, Germany. It cost him 1,000 RM, equivalent to about $450 during the Great Depression, according to the National Postal Museum. His ticket survived the disaster on May 6, 1937. He did not. He died, along with 35 others.

The exhibit, “Fire and Ice,” which opened in spring 2012 for the 75th anniversary, included never-before-seen discoveries like the map of the Hindenburg’s route across the Atlantic, but now, thanks to the Dolan family, it will also include what may be the only surviving passenger ticket from the disaster....